fix: cleanup + simplify

* feat: unified paginate() endpoint with typed pagination responses

* docs: unified paginate() endpoint

* fix: add tests

README.md

@@ -48,8 +48,8 @@ uv add "fastapi-toolsets[all]"
 - **Database**: Session management, transaction helpers, table locking, and polling-based row change detection
 - **Dependencies**: FastAPI dependency factories (`PathDependency`, `BodyDependency`) for automatic DB lookups from path or body parameters
 - **Fixtures**: Fixture system with dependency management, context support, and pytest integration
-- **Model Mixins**: SQLAlchemy mixins for common column patterns (`UUIDMixin`, `CreatedAtMixin`, `UpdatedAtMixin`, `TimestampMixin`)
+- **Model Mixins**: SQLAlchemy mixins for common column patterns (`UUIDMixin`, `UUIDv7Mixin`, `CreatedAtMixin`, `UpdatedAtMixin`, `TimestampMixin`)
-- **Standardized API Responses**: Consistent response format with `Response`, `PaginatedResponse`, and `PydanticBase`
+- **Standardized API Responses**: Consistent response format with `Response`, `ErrorResponse`, `PaginatedResponse`, `CursorPaginatedResponse` and `OffsetPaginatedResponse`.
 - **Exception Handling**: Structured error responses with automatic OpenAPI documentation
 - **Logging**: Logging configuration with uvicorn integration via `configure_logging` and `get_logger`
 

docs/examples/authentication.md

@@ -0,0 +1 @@
+# Authentication

docs/examples/pagination-search.md

@@ -42,12 +42,17 @@ Declare `searchable_fields`, `facet_fields`, and `order_fields` once on [`CrudFa
 
 
 ## Routes
+
+```python title="routes.py:1:17"
+--8<-- "docs_src/examples/pagination_search/routes.py:1:17"
+```
+
 ### Offset pagination
 
 Best for admin panels or any UI that needs a total item count and numbered pages.
 
-```python title="routes.py:1:36"
+```python title="routes.py:20:40"
---8<-- "docs_src/examples/pagination_search/routes.py:1:36"
+--8<-- "docs_src/examples/pagination_search/routes.py:20:40"
 ```
 
 **Example request**
@@ -61,6 +66,7 @@ GET /articles/offset?page=2&items_per_page=10&search=fastapi&status=published&or
 ```json
 {
   "status": "SUCCESS",
+  "pagination_type": "offset",
   "data": [
     { "id": "3f47ac69-...", "title": "FastAPI tips", "status": "published", ... }
   ],
@@ -83,8 +89,8 @@ GET /articles/offset?page=2&items_per_page=10&search=fastapi&status=published&or
 
 Best for feeds, infinite scroll, or any high-throughput API where offset performance degrades.
 
-```python title="routes.py:39:59"
+```python title="routes.py:43:63"
---8<-- "docs_src/examples/pagination_search/routes.py:39:59"
+--8<-- "docs_src/examples/pagination_search/routes.py:43:63"
 ```
 
 **Example request**
@@ -98,6 +104,7 @@ GET /articles/cursor?items_per_page=10&status=published&order_by=created_at&orde
 ```json
 {
   "status": "SUCCESS",
+  "pagination_type": "cursor",
   "data": [
     { "id": "3f47ac69-...", "title": "FastAPI tips", "status": "published", ... }
   ],
@@ -116,6 +123,47 @@ GET /articles/cursor?items_per_page=10&status=published&order_by=created_at&orde
 
 Pass `next_cursor` as the `cursor` query parameter on the next request to advance to the next page.
 
+### Unified endpoint (both strategies)
+
+!!! info "Added in `v2.3.0`"
+
+[`paginate()`](../module/crud.md#unified-paginate--both-strategies-on-one-endpoint) lets a single endpoint support both strategies via a `pagination_type` query parameter. The `pagination_type` field in the response acts as a discriminator for frontend tooling.
+
+```python title="routes.py:66:90"
+--8<-- "docs_src/examples/pagination_search/routes.py:66:90"
+```
+
+**Offset request** (default)
+
+```
+GET /articles/?pagination_type=offset&page=1&items_per_page=10
+```
+
+```json
+{
+  "status": "SUCCESS",
+  "pagination_type": "offset",
+  "data": ["..."],
+  "pagination": { "total_count": 42, "page": 1, "items_per_page": 10, "has_more": true }
+}
+```
+
+**Cursor request**
+
+```
+GET /articles/?pagination_type=cursor&items_per_page=10
+GET /articles/?pagination_type=cursor&items_per_page=10&cursor=eyJ2YWx1ZSI6...
+```
+
+```json
+{
+  "status": "SUCCESS",
+  "pagination_type": "cursor",
+  "data": ["..."],
+  "pagination": { "next_cursor": "eyJ2YWx1ZSI6...", "prev_cursor": null, "items_per_page": 10, "has_more": true }
+}
+```
+
 ## Search behaviour
 
 Both endpoints inherit the same `searchable_fields` declared on `ArticleCrud`:

docs/index.md

@@ -48,8 +48,8 @@ uv add "fastapi-toolsets[all]"
 - **Database**: Session management, transaction helpers, table locking, and polling-based row change detection
 - **Dependencies**: FastAPI dependency factories (`PathDependency`, `BodyDependency`) for automatic DB lookups from path or body parameters
 - **Fixtures**: Fixture system with dependency management, context support, and pytest integration
-- **Model Mixins**: SQLAlchemy mixins for common column patterns (`UUIDMixin`, `CreatedAtMixin`, `UpdatedAtMixin`, `TimestampMixin`)
+- **Model Mixins**: SQLAlchemy mixins for common column patterns (`UUIDMixin`, `UUIDv7Mixin`, `CreatedAtMixin`, `UpdatedAtMixin`, `TimestampMixin`)
-- **Standardized API Responses**: Consistent response format with `Response`, `PaginatedResponse`, and `PydanticBase`
+- **Standardized API Responses**: Consistent response format with `Response`, `ErrorResponse`, `PaginatedResponse`, `CursorPaginatedResponse` and `OffsetPaginatedResponse`.
 - **Exception Handling**: Structured error responses with automatic OpenAPI documentation
 - **Logging**: Logging configuration with uvicorn integration via `configure_logging` and `get_logger`
 

docs/module/crud.md

@@ -7,10 +7,12 @@ Generic async CRUD operations for SQLAlchemy models with search, pagination, and
 
 ## Overview
 
-The `crud` module provides [`AsyncCrud`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud), an abstract base class with a full suite of async database operations, and [`CrudFactory`](../reference/crud.md#fastapi_toolsets.crud.factory.CrudFactory), a convenience function to instantiate it for a given model.
+The `crud` module provides [`AsyncCrud`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud), a base class with a full suite of async database operations, and [`CrudFactory`](../reference/crud.md#fastapi_toolsets.crud.factory.CrudFactory), a convenience function to instantiate it for a given model.
 
 ## Creating a CRUD class
 
+### Factory style
+
 ```python
 from fastapi_toolsets.crud import CrudFactory
 from myapp.models import User
@@ -18,10 +20,70 @@ from myapp.models import User
 UserCrud = CrudFactory(model=User)
 ```
 
-[`CrudFactory`](../reference/crud.md#fastapi_toolsets.crud.factory.CrudFactory) dynamically creates a class named `AsyncUserCrud` with `User` as its model.
+[`CrudFactory`](../reference/crud.md#fastapi_toolsets.crud.factory.CrudFactory) dynamically creates a class named `AsyncUserCrud` with `User` as its model. This is the most concise option for straightforward CRUD with no custom logic.
+
+### Subclass style
+
+!!! info "Added in `v2.3.0`"
+
+```python
+from fastapi_toolsets.crud.factory import AsyncCrud
+from myapp.models import User
+
+class UserCrud(AsyncCrud[User]):
+    model = User
+    searchable_fields = [User.username, User.email]
+    default_load_options = [selectinload(User.role)]
+```
+
+Subclassing [`AsyncCrud`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud) directly is the preferred style when you need to add custom methods or when the configuration is complex enough to benefit from a named class body. 
+
+### Adding custom methods
+
+```python
+class UserCrud(AsyncCrud[User]):
+    model = User
+
+    @classmethod
+    async def get_active(cls, session: AsyncSession) -> list[User]:
+        return await cls.get_multi(session, filters=[User.is_active == True])
+```
+
+### Sharing a custom base across multiple models
+
+Define a generic base class with the shared methods, then subclass it for each model:
+
+```python
+from typing import Generic, TypeVar
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.orm import DeclarativeBase
+from fastapi_toolsets.crud.factory import AsyncCrud
+
+T = TypeVar("T", bound=DeclarativeBase)
+
+class AuditedCrud(AsyncCrud[T], Generic[T]):
+    """Base CRUD with custom function"""
+
+    @classmethod
+    async def get_active(cls, session: AsyncSession):
+        return await cls.get_multi(session, filters=[cls.model.is_active == True])
+
+
+class UserCrud(AuditedCrud[User]):
+    model = User
+    searchable_fields = [User.username, User.email]
+```
+
+You can also use the factory shorthand with the same base by passing `base_class`:
+
+```python
+UserCrud = CrudFactory(User, base_class=AuditedCrud)
+```
 
 ## Basic operations
 
+!!! info "`get_or_none` added in `v2.2`"
+
 ```python
 # Create
 user = await UserCrud.create(session=session, obj=UserCreateSchema(username="alice"))
@@ -29,6 +91,9 @@ user = await UserCrud.create(session=session, obj=UserCreateSchema(username="ali
 # Get one (raises NotFoundError if not found)
 user = await UserCrud.get(session=session, filters=[User.id == user_id])
 
+# Get one or None (never raises)
+user = await UserCrud.get_or_none(session=session, filters=[User.id == user_id])
+
 # Get first or None
 user = await UserCrud.first(session=session, filters=[User.email == email])
 
@@ -46,45 +111,74 @@ count = await UserCrud.count(session=session, filters=[User.is_active == True])
 exists = await UserCrud.exists(session=session, filters=[User.email == email])
 ```
 
+## Fetching a single record
+
+Three methods fetch a single record — choose based on how you want to handle the "not found" case and whether you need strict uniqueness:
+
+| Method | Not found | Multiple results |
+|---|---|---|
+| `get` | raises `NotFoundError` | raises `MultipleResultsFound` |
+| `get_or_none` | returns `None` | raises `MultipleResultsFound` |
+| `first` | returns `None` | returns the first match silently |
+
+Use `get` when the record must exist (e.g. a detail endpoint that should return 404):
+
+```python
+user = await UserCrud.get(session=session, filters=[User.id == user_id])
+```
+
+Use `get_or_none` when the record may not exist but you still want strict uniqueness enforcement:
+
+```python
+user = await UserCrud.get_or_none(session=session, filters=[User.email == email])
+if user is None:
+    ...  # handle missing case without catching an exception
+```
+
+Use `first` when you only care about any one match and don't need uniqueness:
+
+```python
+user = await UserCrud.first(session=session, filters=[User.is_active == True])
+```
+
 ## Pagination
 
 !!! info "Added in `v1.1` (only offset_pagination via `paginate` if `<v1.1`)"
 
-Two pagination strategies are available. Both return a [`PaginatedResponse`](../reference/schemas.md#fastapi_toolsets.schemas.PaginatedResponse) but differ in how they navigate through results.
+Three pagination methods are available.  All return a typed response whose `pagination_type` field tells clients which strategy was used.
 
-| | `offset_paginate` | `cursor_paginate` |
+| | `offset_paginate` | `cursor_paginate` | `paginate` |
-|---|---|---|
+|---|---|---|---|
-| Total count | Yes | No |
+| Return type | `OffsetPaginatedResponse` | `CursorPaginatedResponse` | either, based on `pagination_type` param |
-| Jump to arbitrary page | Yes | No |
+| Total count | Yes | No | / |
-| Performance on deep pages | Degrades | Constant |
+| Jump to arbitrary page | Yes | No | / |
-| Stable under concurrent inserts | No | Yes |
+| Performance on deep pages | Degrades | Constant | / |
-| Search compatible | Yes | Yes |
+| Stable under concurrent inserts | No | Yes | / |
-| Use case | Admin panels, numbered pagination | Feeds, APIs, infinite scroll |
+| Use case | Admin panels, numbered pagination | Feeds, APIs, infinite scroll | single endpoint, both strategies |
 
 ### Offset pagination
 
 ```python
-@router.get(
+@router.get("")
-    "",
-    response_model=PaginatedResponse[User],
-)
 async def get_users(
     session: SessionDep,
     items_per_page: int = 50,
     page: int = 1,
-):
+) -> OffsetPaginatedResponse[UserRead]:
-    return await crud.UserCrud.offset_paginate(
+    return await UserCrud.offset_paginate(
         session=session,
         items_per_page=items_per_page,
         page=page,
+        schema=UserRead,
     )
 ```
 
-The [`offset_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.offset_paginate) method returns a [`PaginatedResponse`](../reference/schemas.md#fastapi_toolsets.schemas.PaginatedResponse) whose `pagination` field is an [`OffsetPagination`](../reference/schemas.md#fastapi_toolsets.schemas.OffsetPagination) object:
+The [`offset_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.offset_paginate) method returns an [`OffsetPaginatedResponse`](../reference/schemas.md#fastapi_toolsets.schemas.OffsetPaginatedResponse):
 
 ```json
 {
   "status": "SUCCESS",
+  "pagination_type": "offset",
   "data": ["..."],
   "pagination": {
     "total_count": 100,
@@ -98,27 +192,26 @@ The [`offset_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.Async
 ### Cursor pagination
 
 ```python
-@router.get(
+@router.get("")
-    "",
-    response_model=PaginatedResponse[UserRead],
-)
 async def list_users(
     session: SessionDep,
     cursor: str | None = None,
     items_per_page: int = 20,
-):
+) -> CursorPaginatedResponse[UserRead]:
     return await UserCrud.cursor_paginate(
         session=session,
         cursor=cursor,
         items_per_page=items_per_page,
+        schema=UserRead,
     )
 ```
 
-The [`cursor_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.cursor_paginate) method returns a [`PaginatedResponse`](../reference/schemas.md#fastapi_toolsets.schemas.PaginatedResponse) whose `pagination` field is a [`CursorPagination`](../reference/schemas.md#fastapi_toolsets.schemas.CursorPagination) object:
+The [`cursor_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.cursor_paginate) method returns a [`CursorPaginatedResponse`](../reference/schemas.md#fastapi_toolsets.schemas.CursorPaginatedResponse):
 
 ```json
 {
   "status": "SUCCESS",
+  "pagination_type": "cursor",
   "data": ["..."],
   "pagination": {
     "next_cursor": "eyJ2YWx1ZSI6ICIzZjQ3YWM2OS0uLi4ifQ==",
@@ -163,6 +256,41 @@ PostCrud = CrudFactory(model=Post, cursor_column=Post.id)
 PostCrud = CrudFactory(model=Post, cursor_column=Post.created_at)
 ```
 
+### Unified endpoint (both strategies)
+
+!!! info "Added in `v2.3.0`"
+
+[`paginate()`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.paginate) dispatches to `offset_paginate` or `cursor_paginate` based on a `pagination_type` query parameter, letting you expose **one endpoint** that supports both strategies.  The `pagination_type` field in the response tells clients which strategy was used, enabling frontend discriminated-union typing.
+
+```python
+from fastapi_toolsets.crud import PaginationType
+from fastapi_toolsets.schemas import PaginatedResponse
+
+@router.get("")
+async def list_users(
+    session: SessionDep,
+    pagination_type: PaginationType = PaginationType.OFFSET,
+    page: int = Query(1, ge=1, description="Current page (offset only)"),
+    cursor: str | None = Query(None, description="Cursor token (cursor only)"),
+    items_per_page: int = Query(20, ge=1, le=100),
+) -> PaginatedResponse[UserRead]:
+    return await UserCrud.paginate(
+        session,
+        pagination_type=pagination_type,
+        page=page,
+        cursor=cursor,
+        items_per_page=items_per_page,
+        schema=UserRead,
+    )
+```
+
+```
+GET /users?pagination_type=offset&page=2&items_per_page=10
+GET /users?pagination_type=cursor&cursor=eyJ2YWx1ZSI6...&items_per_page=10
+```
+
+Both `page` and `cursor` are always accepted by the endpoint — unused parameters are silently ignored by `paginate()`.
+
 ## Search
 
 Two search strategies are available, both compatible with [`offset_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.offset_paginate) and [`cursor_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.cursor_paginate).
@@ -177,6 +305,9 @@ Two search strategies are available, both compatible with [`offset_paginate`](..
 
 ### Full-text search
 
+!!! info "Added in `v2.2.1`"
+    The model's primary key is always included in `searchable_fields` automatically, so searching by ID works out of the box without any configuration. When no `searchable_fields` are declared, only the primary key is searched.
+
 Declare `searchable_fields` on the CRUD class. Relationship traversal is supported via tuples:
 
 ```python
@@ -202,40 +333,36 @@ result = await UserCrud.offset_paginate(
 This allows searching with both [`offset_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.offset_paginate) and [`cursor_paginate`](../reference/crud.md#fastapi_toolsets.crud.factory.AsyncCrud.cursor_paginate):
 
 ```python
-@router.get(
+@router.get("")
-    "",
-    response_model=PaginatedResponse[User],
-)
 async def get_users(
     session: SessionDep,
     items_per_page: int = 50,
     page: int = 1,
     search: str | None = None,
-):
+) -> OffsetPaginatedResponse[UserRead]:
-    return await crud.UserCrud.offset_paginate(
+    return await UserCrud.offset_paginate(
         session=session,
         items_per_page=items_per_page,
         page=page,
         search=search,
+        schema=UserRead,
     )
 ```
 
 ```python
-@router.get(
+@router.get("")
-    "",
-    response_model=PaginatedResponse[User],
-)
 async def get_users(
     session: SessionDep,
     cursor: str | None = None,
     items_per_page: int = 50,
     search: str | None = None,
-):
+) -> CursorPaginatedResponse[UserRead]:
-    return await crud.UserCrud.cursor_paginate(
+    return await UserCrud.cursor_paginate(
         session=session,
         items_per_page=items_per_page,
         cursor=cursor,
         search=search,
+        schema=UserRead,
     )
 ```
 
@@ -306,11 +433,12 @@ async def list_users(
     session: SessionDep,
     page: int = 1,
     filter_by: Annotated[dict[str, list[str]], Depends(UserCrud.filter_params())],
-) -> PaginatedResponse[UserRead]:
+) -> OffsetPaginatedResponse[UserRead]:
     return await UserCrud.offset_paginate(
         session=session,
         page=page,
         filter_by=filter_by,
+        schema=UserRead,
     )
 ```
 
@@ -350,8 +478,8 @@ from fastapi_toolsets.crud import OrderByClause
 async def list_users(
     session: SessionDep,
     order_by: Annotated[OrderByClause | None, Depends(UserCrud.order_params())],
-) -> PaginatedResponse[UserRead]:
+) -> OffsetPaginatedResponse[UserRead]:
-    return await UserCrud.offset_paginate(session=session, order_by=order_by)
+    return await UserCrud.offset_paginate(session=session, order_by=order_by, schema=UserRead)
 ```
 
 The dependency adds two query parameters to the endpoint:
@@ -458,7 +586,7 @@ async def get_user(session: SessionDep, uuid: UUID) -> Response[UserRead]:
     )
 
 @router.get("")
-async def list_users(session: SessionDep, page: int = 1) -> PaginatedResponse[UserRead]:
+async def list_users(session: SessionDep, page: int = 1) -> OffsetPaginatedResponse[UserRead]:
     return await crud.UserCrud.offset_paginate(
         session=session,
         page=page,

docs/module/dependencies.md

@@ -13,8 +13,13 @@ The `dependencies` module provides two factory functions that create FastAPI dep
 ```python
 from fastapi_toolsets.dependencies import PathDependency
 
+# Plain callable
 UserDep = PathDependency(model=User, field=User.id, session_dep=get_db)
 
+# Annotated
+SessionDep = Annotated[AsyncSession, Depends(get_db)]
+UserDep = PathDependency(model=User, field=User.id, session_dep=SessionDep)
+
 @router.get("/users/{user_id}")
 async def get_user(user: User = UserDep):
     return user
@@ -37,8 +42,14 @@ async def get_user(user: User = UserDep):
 ```python
 from fastapi_toolsets.dependencies import BodyDependency
 
+# Plain callable
 RoleDep = BodyDependency(model=Role, field=Role.id, session_dep=get_db, body_field="role_id")
 
+# Annotated
+SessionDep = Annotated[AsyncSession, Depends(get_db)]
+RoleDep = BodyDependency(model=Role, field=Role.id, session_dep=SessionDep, body_field="role_id")
+
+
 @router.post("/users")
 async def create_user(body: UserCreateSchema, role: Role = RoleDep):
     user = User(username=body.username, role=role)

docs/module/models.md

@@ -18,13 +18,15 @@ class Article(Base, UUIDMixin, TimestampMixin):
     content: Mapped[str]
 ```
 
-All timestamp columns are timezone-aware (`TIMESTAMPTZ`). All defaults are server-side, so they are also applied when inserting rows via raw SQL outside the ORM.
+All timestamp columns are timezone-aware (`TIMESTAMPTZ`). All defaults are server-side (`clock_timestamp()`), so they are also applied when inserting rows via raw SQL outside the ORM.
 
 ## Mixins
 
 ### [`UUIDMixin`](../reference/models.md#fastapi_toolsets.models.UUIDMixin)
 
-Adds a `id: UUID` primary key generated server-side by PostgreSQL using `gen_random_uuid()` (requires PostgreSQL 13+). The value is retrieved via `RETURNING` after insert, so it is available on the Python object immediately after `flush()`.
+Adds a `id: UUID` primary key generated server-side by PostgreSQL using `gen_random_uuid()`. The value is retrieved via `RETURNING` after insert, so it is available on the Python object immediately after `flush()`.
+
+!!! warning "Requires PostgreSQL 13+"
 
 ```python
 from fastapi_toolsets.models import UUIDMixin
@@ -36,13 +38,37 @@ class User(Base, UUIDMixin):
 
 # id is None before flush
 user = User(username="alice")
+session.add(user)
 await session.flush()
 print(user.id)  # UUID('...')
 ```
 
+### [`UUIDv7Mixin`](../reference/models.md#fastapi_toolsets.models.UUIDv7Mixin)
+
+!!! info "Added in `v2.3`"
+
+Adds a `id: UUID` primary key generated server-side by PostgreSQL using `uuidv7()`. It's a time-ordered UUID format that encodes a millisecond-precision timestamp in the most significant bits, making it naturally sortable and index-friendly.
+
+!!! warning "Requires PostgreSQL 18+"
+
+```python
+from fastapi_toolsets.models import UUIDv7Mixin
+
+class Event(Base, UUIDv7Mixin):
+    __tablename__ = "events"
+
+    name: Mapped[str]
+
+# id is None before flush
+event = Event(name="user.signup")
+session.add(event)
+await session.flush()
+print(event.id)  # UUID('019...')
+```
+
 ### [`CreatedAtMixin`](../reference/models.md#fastapi_toolsets.models.CreatedAtMixin)
 
-Adds a `created_at: datetime` column set to `NOW()` on insert. The column has no `onupdate` hook — it is intentionally immutable after the row is created.
+Adds a `created_at: datetime` column set to `clock_timestamp()` on insert. The column has no `onupdate` hook — it is intentionally immutable after the row is created.
 
 ```python
 from fastapi_toolsets.models import UUIDMixin, CreatedAtMixin
@@ -55,7 +81,7 @@ class Order(Base, UUIDMixin, CreatedAtMixin):
 
 ### [`UpdatedAtMixin`](../reference/models.md#fastapi_toolsets.models.UpdatedAtMixin)
 
-Adds an `updated_at: datetime` column set to `NOW()` on insert and automatically updated to `NOW()` on every ORM-level update (via SQLAlchemy's `onupdate` hook).
+Adds an `updated_at: datetime` column set to `clock_timestamp()` on insert and automatically updated to `clock_timestamp()` on every ORM-level update (via SQLAlchemy's `onupdate` hook).
 
 ```python
 from fastapi_toolsets.models import UUIDMixin, UpdatedAtMixin

docs/module/schemas.md

@@ -20,50 +20,115 @@ async def get_user(user: User = UserDep) -> Response[UserSchema]:
     return Response(data=user, message="User retrieved")
 ```
 
-### [`PaginatedResponse[T]`](../reference/schemas.md#fastapi_toolsets.schemas.PaginatedResponse)
+### Paginated response models
 
-Wraps a list of items with pagination metadata and optional facet values. The `pagination` field accepts either [`OffsetPagination`](../reference/schemas.md#fastapi_toolsets.schemas.OffsetPagination) or [`CursorPagination`](../reference/schemas.md#fastapi_toolsets.schemas.CursorPagination) depending on the strategy used.
+Three classes wrap paginated list results. Pick the one that matches your endpoint's strategy:
 
-#### [`OffsetPagination`](../reference/schemas.md#fastapi_toolsets.schemas.OffsetPagination)
+| Class | `pagination` type | `pagination_type` field | Use when |
+|---|---|---|---|
+| [`OffsetPaginatedResponse[T]`](#offsetpaginatedresponset) | `OffsetPagination` | `"offset"` (fixed) | endpoint always uses offset |
+| [`CursorPaginatedResponse[T]`](#cursorpaginatedresponset) | `CursorPagination` | `"cursor"` (fixed) | endpoint always uses cursor |
+| [`PaginatedResponse[T]`](#paginatedresponset) | `OffsetPagination \| CursorPagination` | — | unified endpoint supporting both strategies |
 
-Page-number based. Requires `total_count` so clients can compute the total number of pages.
+#### [`OffsetPaginatedResponse[T]`](../reference/schemas.md#fastapi_toolsets.schemas.OffsetPaginatedResponse)
+
+!!! info "Added in `v2.3.0`"
+
+Use as the return type when the endpoint always uses [`offset_paginate`](crud.md#offset-pagination).  The `pagination` field is guaranteed to be an [`OffsetPagination`](../reference/schemas.md#fastapi_toolsets.schemas.OffsetPagination) object; the response always includes a `pagination_type: "offset"` discriminator.
 
 ```python
-from fastapi_toolsets.schemas import PaginatedResponse, OffsetPagination
+from fastapi_toolsets.schemas import OffsetPaginatedResponse
 
 @router.get("/users")
-async def list_users() -> PaginatedResponse[UserSchema]:
+async def list_users(
-    return PaginatedResponse(
+    page: int = 1,
-        data=users,
+    items_per_page: int = 20,
-        pagination=OffsetPagination(
+) -> OffsetPaginatedResponse[UserSchema]:
-            total_count=100,
+    return await UserCrud.offset_paginate(
-            items_per_page=10,
+        session, page=page, items_per_page=items_per_page, schema=UserSchema
-            page=1,
-            has_more=True,
-        ),
     )
 ```
 
-#### [`CursorPagination`](../reference/schemas.md#fastapi_toolsets.schemas.CursorPagination)
+**Response shape:**
 
-Cursor based. Efficient for large or frequently updated datasets where offset pagination is impractical. Provides opaque `next_cursor` / `prev_cursor` tokens; no total count is exposed.
+```json
+{
+  "status": "SUCCESS",
+  "pagination_type": "offset",
+  "data": ["..."],
+  "pagination": {
+    "total_count": 100,
+    "page": 1,
+    "items_per_page": 20,
+    "has_more": true
+  }
+}
+```
+
+#### [`CursorPaginatedResponse[T]`](../reference/schemas.md#fastapi_toolsets.schemas.CursorPaginatedResponse)
+
+!!! info "Added in `v2.3.0`"
+
+Use as the return type when the endpoint always uses [`cursor_paginate`](crud.md#cursor-pagination).  The `pagination` field is guaranteed to be a [`CursorPagination`](../reference/schemas.md#fastapi_toolsets.schemas.CursorPagination) object; the response always includes a `pagination_type: "cursor"` discriminator.
 
 ```python
-from fastapi_toolsets.schemas import PaginatedResponse, CursorPagination
+from fastapi_toolsets.schemas import CursorPaginatedResponse
 
 @router.get("/events")
-async def list_events() -> PaginatedResponse[EventSchema]:
+async def list_events(
-    return PaginatedResponse(
+    cursor: str | None = None,
-        data=events,
+    items_per_page: int = 20,
-        pagination=CursorPagination(
+) -> CursorPaginatedResponse[EventSchema]:
-            next_cursor="eyJpZCI6IDQyfQ==",
+    return await EventCrud.cursor_paginate(
-            prev_cursor=None,
+        session, cursor=cursor, items_per_page=items_per_page, schema=EventSchema
-            items_per_page=20,
-            has_more=True,
-        ),
     )
 ```
 
+**Response shape:**
+
+```json
+{
+  "status": "SUCCESS",
+  "pagination_type": "cursor",
+  "data": ["..."],
+  "pagination": {
+    "next_cursor": "eyJpZCI6IDQyfQ==",
+    "prev_cursor": null,
+    "items_per_page": 20,
+    "has_more": true
+  }
+}
+```
+
+#### [`PaginatedResponse[T]`](../reference/schemas.md#fastapi_toolsets.schemas.PaginatedResponse)
+
+Return type for endpoints that support **both** pagination strategies via a `pagination_type` query parameter (using [`paginate()`](crud.md#unified-paginate--both-strategies-on-one-endpoint)).
+
+When used as a return annotation, `PaginatedResponse[T]` automatically expands to `Annotated[Union[CursorPaginatedResponse[T], OffsetPaginatedResponse[T]], Field(discriminator="pagination_type")]`, so FastAPI emits a proper `oneOf` + discriminator in the OpenAPI schema with no extra boilerplate:
+
+```python
+from fastapi_toolsets.crud import PaginationType
+from fastapi_toolsets.schemas import PaginatedResponse
+
+@router.get("/users")
+async def list_users(
+    pagination_type: PaginationType = PaginationType.OFFSET,
+    page: int = 1,
+    cursor: str | None = None,
+    items_per_page: int = 20,
+) -> PaginatedResponse[UserSchema]:
+    return await UserCrud.paginate(
+        session,
+        pagination_type=pagination_type,
+        page=page,
+        cursor=cursor,
+        items_per_page=items_per_page,
+        schema=UserSchema,
+    )
+```
+
+#### Pagination metadata models
+
 The optional `filter_attributes` field is populated when `facet_fields` are configured on the CRUD class (see [Filter attributes](crud.md#filter-attributes-facets)). It is `None` by default and can be hidden from API responses with `response_model_exclude_none=True`.
 
 ### [`ErrorResponse`](../reference/schemas.md#fastapi_toolsets.schemas.ErrorResponse)

docs/module/security.md

@@ -0,0 +1,267 @@
+# Security
+
+Composable authentication helpers for FastAPI that use `Security()` for OpenAPI documentation and accept user-provided validator functions with full type flexibility.
+
+## Overview
+
+The `security` module provides four auth source classes and a `MultiAuth` factory. Each class wraps a FastAPI security scheme for OpenAPI and accepts a validator function called as:
+
+```python
+await validator(credential, **kwargs)
+```
+
+where `kwargs` are the extra keyword arguments provided at instantiation (roles, permissions, enums, etc.). The validator returns the authenticated identity (e.g. a `User` model) which becomes the route dependency value.
+
+```python
+from fastapi import Security
+from fastapi_toolsets.security import BearerTokenAuth
+
+async def verify_token(token: str, *, role: str) -> User:
+    user = await db.get_by_token(token)
+    if not user or user.role != role:
+        raise UnauthorizedError()
+    return user
+
+bearer_admin = BearerTokenAuth(verify_token, role="admin")
+
+@app.get("/admin")
+async def admin_route(user: User = Security(bearer_admin)):
+    return user
+```
+
+## Auth sources
+
+### [`BearerTokenAuth`](../reference/security.md#fastapi_toolsets.security.BearerTokenAuth)
+
+Reads the `Authorization: Bearer <token>` header. Wraps `HTTPBearer` for OpenAPI.
+
+```python
+from fastapi_toolsets.security import BearerTokenAuth
+
+bearer = BearerTokenAuth(validator=verify_token)
+
+@app.get("/me")
+async def me(user: User = Security(bearer)):
+    return user
+```
+
+#### Token prefix
+
+The optional `prefix` parameter restricts a `BearerTokenAuth` instance to tokens
+that start with a given string. The prefix is **kept** in the value passed to the
+validator — store and compare tokens with their prefix included.
+
+This lets you deploy multiple `BearerTokenAuth` instances in the same application
+and disambiguate them efficiently in `MultiAuth`:
+
+```python
+user_bearer = BearerTokenAuth(verify_user, prefix="user_")  # matches "Bearer user_..."
+org_bearer  = BearerTokenAuth(verify_org,  prefix="org_")   # matches "Bearer org_..."
+```
+
+Use [`generate_token()`](#token-generation) to create correctly-prefixed tokens.
+
+#### Token generation
+
+`BearerTokenAuth.generate_token()` produces a secure random token ready to store
+in your database and return to the client. If a prefix is configured it is
+prepended automatically:
+
+```python
+bearer = BearerTokenAuth(verify_token, prefix="user_")
+
+token = bearer.generate_token()   # e.g. "user_Xk3mN..."
+await db.store_token(user_id, token)
+return {"access_token": token, "token_type": "bearer"}
+```
+
+The client sends `Authorization: Bearer user_Xk3mN...` and the validator receives
+the full token (prefix included) to compare against the stored value.
+
+### [`CookieAuth`](../reference/security.md#fastapi_toolsets.security.CookieAuth)
+
+Reads a named cookie. Wraps `APIKeyCookie` for OpenAPI.
+
+```python
+from fastapi_toolsets.security import CookieAuth
+
+cookie_auth = CookieAuth("session", validator=verify_session)
+
+@app.get("/me")
+async def me(user: User = Security(cookie_auth)):
+    return user
+```
+
+### [`OAuth2Auth`](../reference/security.md#fastapi_toolsets.security.OAuth2Auth)
+
+Reads the `Authorization: Bearer <token>` header and registers the token endpoint
+in OpenAPI via `OAuth2PasswordBearer`.
+
+```python
+from fastapi_toolsets.security import OAuth2Auth
+
+oauth2_auth = OAuth2Auth(token_url="/token", validator=verify_token)
+
+@app.get("/me")
+async def me(user: User = Security(oauth2_auth)):
+    return user
+```
+
+### [`OpenIDAuth`](../reference/security.md#fastapi_toolsets.security.OpenIDAuth)
+
+Reads the `Authorization: Bearer <token>` header and registers the OpenID Connect
+discovery URL in OpenAPI via `OpenIdConnect`. Token validation is fully delegated
+to your validator — use any OIDC / JWT library (`authlib`, `python-jose`, `PyJWT`).
+
+```python
+from fastapi_toolsets.security import OpenIDAuth
+
+async def verify_google_token(token: str, *, audience: str) -> User:
+    payload = jwt.decode(token, google_public_keys, algorithms=["RS256"],
+                         audience=audience)
+    return User(email=payload["email"], name=payload["name"])
+
+google_auth = OpenIDAuth(
+    "https://accounts.google.com/.well-known/openid-configuration",
+    verify_google_token,
+    audience="my-client-id",
+)
+
+@app.get("/me")
+async def me(user: User = Security(google_auth)):
+    return user
+```
+
+The discovery URL is used **only for OpenAPI documentation** — no requests are made
+to it by this class. You are responsible for fetching and caching the provider's
+public keys in your validator.
+
+Multiple providers work naturally with `MultiAuth`:
+
+```python
+multi = MultiAuth(google_auth, github_auth)
+
+@app.get("/data")
+async def data(user: User = Security(multi)):
+    return user
+```
+
+## Typed validator kwargs
+
+All auth classes forward extra instantiation keyword arguments to the validator.
+Arguments can be any type — enums, strings, integers, etc. The validator returns
+the authenticated identity, which FastAPI injects directly into the route handler.
+
+```python
+async def verify_token(token: str, *, role: Role, permission: str) -> User:
+    user = await decode_token(token)
+    if user.role != role or permission not in user.permissions:
+        raise UnauthorizedError()
+    return user
+
+bearer = BearerTokenAuth(verify_token, role=Role.ADMIN, permission="billing:read")
+```
+
+Each auth instance is self-contained — create a separate instance per distinct
+requirement instead of passing requirements through `Security(scopes=[...])`.
+
+### Using `.require()` inline
+
+If declaring a new top-level variable per role feels verbose, use `.require()` to
+create a configured clone directly in the route decorator. The original instance
+is not mutated:
+
+```python
+bearer = BearerTokenAuth(verify_token)
+
+@app.get("/admin/stats")
+async def admin_stats(user: User = Security(bearer.require(role=Role.ADMIN))):
+    return {"message": f"Hello admin {user.name}"}
+
+@app.get("/profile")
+async def profile(user: User = Security(bearer.require(role=Role.USER))):
+    return {"id": user.id, "name": user.name}
+```
+
+`.require()` kwargs are merged over existing ones — new values win on conflict.
+The `prefix` (for `BearerTokenAuth`) and cookie name (for `CookieAuth`) are
+always preserved.
+
+`.require()` instances work transparently inside `MultiAuth`:
+
+```python
+multi = MultiAuth(
+    user_bearer.require(role=Role.USER),
+    org_bearer.require(role=Role.ADMIN),
+)
+```
+
+## MultiAuth
+
+[`MultiAuth`](../reference/security.md#fastapi_toolsets.security.MultiAuth) combines
+multiple auth sources into a single callable. Sources are tried in order; the
+first one that finds a credential wins.
+
+```python
+from fastapi_toolsets.security import MultiAuth
+
+multi = MultiAuth(user_bearer, org_bearer, cookie_auth)
+
+@app.get("/data")
+async def data_route(user = Security(multi)):
+    return user
+```
+
+### Using `.require()` on MultiAuth
+
+`MultiAuth` also supports `.require()`, which propagates the kwargs to every
+source that implements it. Sources that do not (e.g. custom `AuthSource`
+subclasses) are passed through unchanged:
+
+```python
+multi = MultiAuth(bearer, cookie)
+
+@app.get("/admin")
+async def admin(user: User = Security(multi.require(role=Role.ADMIN))):
+    return user
+```
+
+This is equivalent to calling `.require()` on each source individually:
+
+```python
+# These two are identical
+multi.require(role=Role.ADMIN)
+
+MultiAuth(
+    bearer.require(role=Role.ADMIN),
+    cookie.require(role=Role.ADMIN),
+)
+```
+
+### Prefix-based dispatch
+
+Because `extract()` is pure string matching (no I/O), prefix-based source
+selection is essentially free. Only the matching source's validator (which may
+involve DB or network I/O) is ever called:
+
+```python
+user_bearer = BearerTokenAuth(verify_user, prefix="user_")
+org_bearer  = BearerTokenAuth(verify_org,  prefix="org_")
+
+multi = MultiAuth(user_bearer, org_bearer)
+
+# "Bearer user_alice" → only verify_user runs, receives "user_alice"
+# "Bearer org_acme"   → only verify_org runs, receives "org_acme"
+```
+
+Tokens are stored and compared **with their prefix** — use `generate_token()` on
+each source to issue correctly-prefixed tokens:
+
+```python
+user_token = user_bearer.generate_token()  # "user_..."
+org_token  = org_bearer.generate_token()   # "org_..."
+```
+
+---
+
+[:material-api: API Reference](../reference/security.md)

docs/reference/models.md

@@ -7,6 +7,7 @@ You can import them directly from `fastapi_toolsets.models`:
 ```python
 from fastapi_toolsets.models import (
     UUIDMixin,
+    UUIDv7Mixin,
     CreatedAtMixin,
     UpdatedAtMixin,
     TimestampMixin,
@@ -15,6 +16,8 @@ from fastapi_toolsets.models import (
 
 ## ::: fastapi_toolsets.models.UUIDMixin
 
+## ::: fastapi_toolsets.models.UUIDv7Mixin
+
 ## ::: fastapi_toolsets.models.CreatedAtMixin
 
 ## ::: fastapi_toolsets.models.UpdatedAtMixin

docs/reference/schemas.md

@@ -14,7 +14,10 @@ from fastapi_toolsets.schemas import (
     ErrorResponse,
     OffsetPagination,
     CursorPagination,
+    PaginationType,
     PaginatedResponse,
+    OffsetPaginatedResponse,
+    CursorPaginatedResponse,
 )
 ```
 
@@ -34,4 +37,10 @@ from fastapi_toolsets.schemas import (
 
 ## ::: fastapi_toolsets.schemas.CursorPagination
 
+## ::: fastapi_toolsets.schemas.PaginationType
+
 ## ::: fastapi_toolsets.schemas.PaginatedResponse
+
+## ::: fastapi_toolsets.schemas.OffsetPaginatedResponse
+
+## ::: fastapi_toolsets.schemas.CursorPaginatedResponse

docs/reference/security.md

@@ -0,0 +1,28 @@
+# `security`
+
+Here's the reference for the authentication helpers provided by the `security` module.
+
+You can import them directly from `fastapi_toolsets.security`:
+
+```python
+from fastapi_toolsets.security import (
+    AuthSource,
+    BearerTokenAuth,
+    CookieAuth,
+    OAuth2Auth,
+    OpenIDAuth,
+    MultiAuth,
+)
+```
+
+## ::: fastapi_toolsets.security.AuthSource
+
+## ::: fastapi_toolsets.security.BearerTokenAuth
+
+## ::: fastapi_toolsets.security.CookieAuth
+
+## ::: fastapi_toolsets.security.OAuth2Auth
+
+## ::: fastapi_toolsets.security.OpenIDAuth
+
+## ::: fastapi_toolsets.security.MultiAuth

docs_src/examples/authentication/app.py

@@ -0,0 +1,9 @@
+from fastapi import FastAPI
+
+from fastapi_toolsets.exceptions import init_exceptions_handlers
+
+from .routes import router
+
+app = FastAPI()
+init_exceptions_handlers(app=app)
+app.include_router(router=router)

docs_src/examples/authentication/crud.py

@@ -0,0 +1,9 @@
+from fastapi_toolsets.crud import CrudFactory
+
+from .models import OAuthAccount, OAuthProvider, Team, User, UserToken
+
+TeamCrud = CrudFactory(model=Team)
+UserCrud = CrudFactory(model=User)
+UserTokenCrud = CrudFactory(model=UserToken)
+OAuthProviderCrud = CrudFactory(model=OAuthProvider)
+OAuthAccountCrud = CrudFactory(model=OAuthAccount)

docs_src/examples/authentication/db.py

@@ -0,0 +1,15 @@
+from fastapi import Depends
+from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
+
+from fastapi_toolsets.db import create_db_context, create_db_dependency
+
+DATABASE_URL = "postgresql+asyncpg://postgres:postgres@localhost:5432/postgres"
+
+engine = create_async_engine(url=DATABASE_URL, future=True)
+async_session_maker = async_sessionmaker(bind=engine, expire_on_commit=False)
+
+get_db = create_db_dependency(session_maker=async_session_maker)
+get_db_context = create_db_context(session_maker=async_session_maker)
+
+
+SessionDep = Depends(get_db)

docs_src/examples/authentication/models.py

@@ -0,0 +1,105 @@
+import enum
+from datetime import datetime
+from uuid import UUID
+
+from sqlalchemy import (
+    Boolean,
+    DateTime,
+    Enum,
+    ForeignKey,
+    Integer,
+    String,
+    UniqueConstraint,
+)
+from sqlalchemy.dialects.postgresql import UUID as PG_UUID
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
+
+from fastapi_toolsets.models import TimestampMixin, UUIDMixin
+
+
+class Base(DeclarativeBase, UUIDMixin):
+    type_annotation_map = {
+        str: String(),
+        int: Integer(),
+        UUID: PG_UUID(as_uuid=True),
+        datetime: DateTime(timezone=True),
+    }
+
+
+class UserRole(enum.Enum):
+    admin = "admin"
+    moderator = "moderator"
+    user = "user"
+
+
+class Team(Base, TimestampMixin):
+    __tablename__ = "teams"
+
+    name: Mapped[str] = mapped_column(String, unique=True, index=True)
+    users: Mapped[list["User"]] = relationship(back_populates="team")
+
+
+class User(Base, TimestampMixin):
+    __tablename__ = "users"
+
+    username: Mapped[str] = mapped_column(String, unique=True, index=True)
+    email: Mapped[str | None] = mapped_column(
+        String, unique=True, index=True, nullable=True
+    )
+    hashed_password: Mapped[str | None] = mapped_column(String, nullable=True)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    role: Mapped[UserRole] = mapped_column(Enum(UserRole), default=UserRole.user)
+
+    team_id: Mapped[UUID | None] = mapped_column(ForeignKey("teams.id"), nullable=True)
+    team: Mapped["Team | None"] = relationship(back_populates="users")
+    oauth_accounts: Mapped[list["OAuthAccount"]] = relationship(back_populates="user")
+    tokens: Mapped[list["UserToken"]] = relationship(back_populates="user")
+
+
+class UserToken(Base, TimestampMixin):
+    """API tokens for a user (multiple allowed)."""
+
+    __tablename__ = "user_tokens"
+
+    user_id: Mapped[UUID] = mapped_column(ForeignKey("users.id"))
+    # Store hashed token value
+    token_hash: Mapped[str] = mapped_column(String, unique=True, index=True)
+    name: Mapped[str | None] = mapped_column(String, nullable=True)
+    expires_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+
+    user: Mapped["User"] = relationship(back_populates="tokens")
+
+
+class OAuthProvider(Base, TimestampMixin):
+    """Configurable OAuth2 / OpenID Connect provider."""
+
+    __tablename__ = "oauth_providers"
+
+    slug: Mapped[str] = mapped_column(String, unique=True, index=True)
+    name: Mapped[str] = mapped_column(String)
+    client_id: Mapped[str] = mapped_column(String)
+    client_secret: Mapped[str] = mapped_column(String)
+    discovery_url: Mapped[str] = mapped_column(String, nullable=False)
+    scopes: Mapped[str] = mapped_column(String, default="openid email profile")
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+
+    accounts: Mapped[list["OAuthAccount"]] = relationship(back_populates="provider")
+
+
+class OAuthAccount(Base, TimestampMixin):
+    """OAuth2 / OpenID Connect account linked to a user."""
+
+    __tablename__ = "oauth_accounts"
+    __table_args__ = (
+        UniqueConstraint("provider_id", "subject", name="uq_oauth_provider_subject"),
+    )
+
+    user_id: Mapped[UUID] = mapped_column(ForeignKey("users.id"))
+    provider_id: Mapped[UUID] = mapped_column(ForeignKey("oauth_providers.id"))
+    # OAuth `sub` / OpenID subject identifier
+    subject: Mapped[str] = mapped_column(String)
+
+    user: Mapped["User"] = relationship(back_populates="oauth_accounts")
+    provider: Mapped["OAuthProvider"] = relationship(back_populates="accounts")

docs_src/examples/authentication/routes.py

@@ -0,0 +1,122 @@
+from typing import Annotated
+from uuid import UUID
+
+import bcrypt
+from fastapi import APIRouter, Form, HTTPException, Response, Security
+
+from fastapi_toolsets.dependencies import PathDependency
+
+from .crud import UserCrud, UserTokenCrud
+from .db import SessionDep
+from .models import OAuthProvider, User, UserToken
+from .schemas import (
+    ApiTokenCreateRequest,
+    ApiTokenResponse,
+    RegisterRequest,
+    UserCreate,
+    UserResponse,
+)
+from .security import auth, cookie_auth, create_api_token
+
+ProviderDep = PathDependency(
+    model=OAuthProvider,
+    field=OAuthProvider.slug,
+    session_dep=SessionDep,
+    param_name="slug",
+)
+
+
+def hash_password(password: str) -> str:
+    return bcrypt.hashpw(password.encode(), bcrypt.gensalt()).decode()
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    return bcrypt.checkpw(plain.encode(), hashed.encode())
+
+
+router = APIRouter(prefix="/auth")
+
+
+@router.post("/register", response_model=UserResponse, status_code=201)
+async def register(body: RegisterRequest, session: SessionDep):
+    existing = await UserCrud.first(
+        session=session, filters=[User.username == body.username]
+    )
+    if existing:
+        raise HTTPException(status_code=409, detail="Username already taken")
+
+    user = await UserCrud.create(
+        session=session,
+        obj=UserCreate(
+            username=body.username,
+            email=body.email,
+            hashed_password=hash_password(body.password),
+        ),
+    )
+    return user
+
+
+@router.post("/token", status_code=204)
+async def login(
+    session: SessionDep,
+    response: Response,
+    username: Annotated[str, Form()],
+    password: Annotated[str, Form()],
+):
+    user = await UserCrud.first(session=session, filters=[User.username == username])
+
+    if (
+        not user
+        or not user.hashed_password
+        or not verify_password(password, user.hashed_password)
+    ):
+        raise HTTPException(status_code=401, detail="Invalid credentials")
+
+    if not user.is_active:
+        raise HTTPException(status_code=403, detail="Account disabled")
+
+    cookie_auth.set_cookie(response, str(user.id))
+
+
+@router.post("/logout", status_code=204)
+async def logout(response: Response):
+    cookie_auth.delete_cookie(response)
+
+
+@router.get("/me", response_model=UserResponse)
+async def me(user: User = Security(auth)):
+    return user
+
+
+@router.post("/tokens", response_model=ApiTokenResponse, status_code=201)
+async def create_token(
+    body: ApiTokenCreateRequest,
+    user: User = Security(auth),
+):
+    raw, token_row = await create_api_token(
+        user.id, name=body.name, expires_at=body.expires_at
+    )
+    return ApiTokenResponse(
+        id=token_row.id,
+        name=token_row.name,
+        expires_at=token_row.expires_at,
+        created_at=token_row.created_at,
+        token=raw,
+    )
+
+
+@router.delete("/tokens/{token_id}", status_code=204)
+async def revoke_token(
+    session: SessionDep,
+    token_id: UUID,
+    user: User = Security(auth),
+):
+    if not await UserTokenCrud.first(
+        session=session,
+        filters=[UserToken.id == token_id, UserToken.user_id == user.id],
+    ):
+        raise HTTPException(status_code=404, detail="Token not found")
+    await UserTokenCrud.delete(
+        session=session,
+        filters=[UserToken.id == token_id, UserToken.user_id == user.id],
+    )

docs_src/examples/authentication/schemas.py

@@ -0,0 +1,64 @@
+from datetime import datetime
+from uuid import UUID
+
+from pydantic import EmailStr
+
+from fastapi_toolsets.schemas import PydanticBase
+
+
+class RegisterRequest(PydanticBase):
+    username: str
+    password: str
+    email: EmailStr | None = None
+
+
+class UserResponse(PydanticBase):
+    id: UUID
+    username: str
+    email: str | None
+    role: str
+    is_active: bool
+
+    model_config = {"from_attributes": True}
+
+
+class ApiTokenCreateRequest(PydanticBase):
+    name: str | None = None
+    expires_at: datetime | None = None
+
+
+class ApiTokenResponse(PydanticBase):
+    id: UUID
+    name: str | None
+    expires_at: datetime | None
+    created_at: datetime
+    # Only populated on creation
+    token: str | None = None
+
+    model_config = {"from_attributes": True}
+
+
+class OAuthProviderResponse(PydanticBase):
+    slug: str
+    name: str
+
+    model_config = {"from_attributes": True}
+
+
+class UserCreate(PydanticBase):
+    username: str
+    email: str | None = None
+    hashed_password: str | None = None
+
+
+class UserTokenCreate(PydanticBase):
+    user_id: UUID
+    token_hash: str
+    name: str | None = None
+    expires_at: datetime | None = None
+
+
+class OAuthAccountCreate(PydanticBase):
+    user_id: UUID
+    provider_id: UUID
+    subject: str

docs_src/examples/authentication/security.py

@@ -0,0 +1,100 @@
+import hashlib
+from datetime import datetime, timezone
+from uuid import UUID
+
+from fastapi import HTTPException
+from sqlalchemy.orm import selectinload
+
+from fastapi_toolsets.exceptions import UnauthorizedError
+from fastapi_toolsets.security import (
+    APIKeyHeaderAuth,
+    BearerTokenAuth,
+    CookieAuth,
+    MultiAuth,
+)
+
+from .crud import UserCrud, UserTokenCrud
+from .db import get_db_context
+from .models import User, UserRole, UserToken
+from .schemas import UserTokenCreate
+
+SESSION_COOKIE = "session"
+SECRET_KEY = "123456789"
+
+
+def _hash_token(token: str) -> str:
+    return hashlib.sha256(token.encode()).hexdigest()
+
+
+async def _verify_token(token: str, role: UserRole | None = None) -> User:
+    async with get_db_context() as db:
+        user_token = await UserTokenCrud.first(
+            session=db,
+            filters=[UserToken.token_hash == _hash_token(token)],
+            load_options=[selectinload(UserToken.user)],
+        )
+
+        if user_token is None or not user_token.user.is_active:
+            raise UnauthorizedError()
+
+        if user_token.expires_at and user_token.expires_at < datetime.now(timezone.utc):
+            raise UnauthorizedError()
+
+        user = user_token.user
+
+        if role is not None and user.role != role:
+            raise HTTPException(status_code=403, detail="Insufficient permissions")
+
+        return user
+
+
+async def _verify_cookie(user_id: str, role: UserRole | None = None) -> User:
+    async with get_db_context() as db:
+        user = await UserCrud.first(
+            session=db,
+            filters=[User.id == UUID(user_id)],
+        )
+
+    if not user or not user.is_active:
+        raise UnauthorizedError()
+
+    if role is not None and user.role != role:
+        raise HTTPException(status_code=403, detail="Insufficient permissions")
+
+    return user
+
+
+bearer_auth = BearerTokenAuth(
+    validator=_verify_token,
+    prefix="ctf_",
+)
+header_auth = APIKeyHeaderAuth(
+    name="X-API-Key",
+    validator=_verify_token,
+)
+cookie_auth = CookieAuth(
+    name=SESSION_COOKIE,
+    validator=_verify_cookie,
+    secret_key=SECRET_KEY,
+)
+auth = MultiAuth(bearer_auth, header_auth, cookie_auth)
+
+
+async def create_api_token(
+    user_id: UUID,
+    *,
+    name: str | None = None,
+    expires_at: datetime | None = None,
+) -> tuple[str, UserToken]:
+    raw = bearer_auth.generate_token()
+    async with get_db_context() as db:
+        token_row = await UserTokenCrud.create(
+            session=db,
+            obj=UserTokenCreate(
+                user_id=user_id,
+                token_hash=_hash_token(raw),
+                name=name,
+                expires_at=expires_at,
+            ),
+        )
+    return raw, token_row

docs_src/examples/pagination_search/models.py

@@ -1,9 +1,10 @@
-import datetime
 import uuid
 
-from sqlalchemy import Boolean, DateTime, ForeignKey, String, Text, func
+from sqlalchemy import Boolean, ForeignKey, String, Text
 from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
 
+from fastapi_toolsets.models import CreatedAtMixin
+
 
 class Base(DeclarativeBase):
     pass
@@ -18,13 +19,10 @@ class Category(Base):
     articles: Mapped[list["Article"]] = relationship(back_populates="category")
 
 
-class Article(Base):
+class Article(Base, CreatedAtMixin):
     __tablename__ = "articles"
 
     id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
-    created_at: Mapped[datetime.datetime] = mapped_column(
-        DateTime(timezone=True), server_default=func.now()
-    )
     title: Mapped[str] = mapped_column(String(256))
     body: Mapped[str] = mapped_column(Text)
     status: Mapped[str] = mapped_column(String(32))

docs_src/examples/pagination_search/routes.py

@@ -2,8 +2,12 @@ from typing import Annotated
 
 from fastapi import APIRouter, Depends, Query
 
-from fastapi_toolsets.crud import OrderByClause
+from fastapi_toolsets.crud import OrderByClause, PaginationType
-from fastapi_toolsets.schemas import PaginatedResponse
+from fastapi_toolsets.schemas import (
+    CursorPaginatedResponse,
+    OffsetPaginatedResponse,
+    PaginatedResponse,
+)
 
 from .crud import ArticleCrud
 from .db import SessionDep
@@ -24,7 +28,7 @@ async def list_articles_offset(
     page: int = Query(1, ge=1),
     items_per_page: int = Query(20, ge=1, le=100),
     search: str | None = None,
-) -> PaginatedResponse[ArticleRead]:
+) -> OffsetPaginatedResponse[ArticleRead]:
     return await ArticleCrud.offset_paginate(
         session=session,
         page=page,
@@ -47,7 +51,7 @@ async def list_articles_cursor(
     cursor: str | None = None,
     items_per_page: int = Query(20, ge=1, le=100),
     search: str | None = None,
-) -> PaginatedResponse[ArticleRead]:
+) -> CursorPaginatedResponse[ArticleRead]:
     return await ArticleCrud.cursor_paginate(
         session=session,
         cursor=cursor,
@@ -57,3 +61,30 @@ async def list_articles_cursor(
         order_by=order_by,
         schema=ArticleRead,
     )
+
+
+@router.get("/")
+async def list_articles(
+    session: SessionDep,
+    filter_by: Annotated[dict[str, list[str]], Depends(ArticleCrud.filter_params())],
+    order_by: Annotated[
+        OrderByClause | None,
+        Depends(ArticleCrud.order_params(default_field=Article.created_at)),
+    ],
+    pagination_type: PaginationType = PaginationType.OFFSET,
+    page: int = Query(1, ge=1),
+    cursor: str | None = None,
+    items_per_page: int = Query(20, ge=1, le=100),
+    search: str | None = None,
+) -> PaginatedResponse[ArticleRead]:
+    return await ArticleCrud.paginate(
+        session,
+        pagination_type=pagination_type,
+        page=page,
+        cursor=cursor,
+        items_per_page=items_per_page,
+        search=search,
+        filter_by=filter_by or None,
+        order_by=order_by,
+        schema=ArticleRead,
+    )

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "fastapi-toolsets"
-version = "2.1.0"
+version = "2.3.0"
 description = "Production-ready utilities for FastAPI applications"
 readme = "README.md"
 license = "MIT"
@@ -66,6 +66,7 @@ manager = "fastapi_toolsets.cli.app:cli"
 dev = [
     {include-group = "tests"},
     {include-group = "docs"},
+    {include-group = "docs-src"},
     "fastapi-toolsets[all]",
     "ruff>=0.1.0",
     "ty>=0.0.1a0",
@@ -82,6 +83,9 @@ docs = [
     "mkdocstrings-python>=2.0.2",
     "zensical>=0.0.23",
 ]
+docs-src = [
+    "bcrypt>=4.0.0",
+]
 
 [build-system]
 requires = ["uv_build>=0.10,<0.11.0"]

src/fastapi_toolsets/__init__.py

@@ -21,4 +21,4 @@ Example usage:
         return Response(data={"user": user.username}, message="Success")
 """
 
-__version__ = "2.1.0"
+__version__ = "2.3.0"

src/fastapi_toolsets/crud/__init__.py

@@ -1,6 +1,7 @@
 """Generic async CRUD operations for SQLAlchemy models."""
 
 from ..exceptions import InvalidFacetFilterError, NoSearchableFieldsError
+from ..schemas import PaginationType
 from ..types import (
     FacetFieldType,
     JoinType,
@@ -8,10 +9,11 @@ from ..types import (
     OrderByClause,
     SearchFieldType,
 )
-from .factory import CrudFactory
+from .factory import AsyncCrud, CrudFactory
 from .search import SearchConfig, get_searchable_fields
 
 __all__ = [
+    "AsyncCrud",
     "CrudFactory",
     "FacetFieldType",
     "get_searchable_fields",
@@ -20,6 +22,7 @@ __all__ = [
     "M2MFieldType",
     "NoSearchableFieldsError",
     "OrderByClause",
+    "PaginationType",
     "SearchConfig",
     "SearchFieldType",
 ]

src/fastapi_toolsets/crud/factory.py

@@ -9,12 +9,12 @@ import uuid as uuid_module
 from collections.abc import Awaitable, Callable, Sequence
 from datetime import date, datetime
 from decimal import Decimal
+from enum import Enum
 from typing import Any, ClassVar, Generic, Literal, Self, cast, overload
 
 from fastapi import Query
 from pydantic import BaseModel
 from sqlalchemy import Date, DateTime, Float, Integer, Numeric, Uuid, and_, func, select
-from sqlalchemy import delete as sql_delete
 from sqlalchemy.dialects.postgresql import insert
 from sqlalchemy.exc import NoResultFound
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -24,7 +24,14 @@ from sqlalchemy.sql.roles import WhereHavingRole
 
 from ..db import get_transaction
 from ..exceptions import InvalidOrderFieldError, NotFoundError
-from ..schemas import CursorPagination, OffsetPagination, PaginatedResponse, Response
+from ..schemas import (
+    CursorPaginatedResponse,
+    CursorPagination,
+    OffsetPaginatedResponse,
+    OffsetPagination,
+    PaginationType,
+    Response,
+)
 from ..types import (
     FacetFieldType,
     JoinType,
@@ -43,14 +50,43 @@ from .search import (
 )
 
 
-def _encode_cursor(value: Any) -> str:
+class _CursorDirection(str, Enum):
-    """Encode cursor column value as an base64 string."""
+    NEXT = "next"
-    return base64.b64encode(json.dumps(str(value)).encode()).decode()
+    PREV = "prev"
 
 
-def _decode_cursor(cursor: str) -> str:
+def _encode_cursor(
-    """Decode cursor base64 string."""
+    value: Any, *, direction: _CursorDirection = _CursorDirection.NEXT
-    return json.loads(base64.b64decode(cursor.encode()).decode())
+) -> str:
+    """Encode a cursor column value and navigation direction as a base64 string."""
+    return base64.b64encode(
+        json.dumps({"val": str(value), "dir": direction}).encode()
+    ).decode()
+
+
+def _decode_cursor(cursor: str) -> tuple[str, _CursorDirection]:
+    """Decode a cursor base64 string into ``(raw_value, direction)``."""
+    payload = json.loads(base64.b64decode(cursor.encode()).decode())
+    return payload["val"], _CursorDirection(payload["dir"])
+
+
+def _parse_cursor_value(raw_val: str, col_type: Any) -> Any:
+    """Parse a raw cursor string value back into the appropriate Python type."""
+    if isinstance(col_type, Integer):
+        return int(raw_val)
+    if isinstance(col_type, Uuid):
+        return uuid_module.UUID(raw_val)
+    if isinstance(col_type, DateTime):
+        return datetime.fromisoformat(raw_val)
+    if isinstance(col_type, Date):
+        return date.fromisoformat(raw_val)
+    if isinstance(col_type, (Float, Numeric)):
+        return Decimal(raw_val)
+    raise ValueError(
+        f"Unsupported cursor column type: {type(col_type).__name__!r}. "
+        "Supported types: Integer, BigInteger, SmallInteger, Uuid, "
+        "DateTime, Date, Float, Numeric."
+    )
 
 
 def _apply_joins(q: Any, joins: JoinType | None, outer_join: bool) -> Any:
@@ -80,13 +116,34 @@ class AsyncCrud(Generic[ModelType]):
     facet_fields: ClassVar[Sequence[FacetFieldType] | None] = None
     order_fields: ClassVar[Sequence[QueryableAttribute[Any]] | None] = None
     m2m_fields: ClassVar[M2MFieldType | None] = None
-    default_load_options: ClassVar[list[ExecutableOption] | None] = None
+    default_load_options: ClassVar[Sequence[ExecutableOption] | None] = None
     cursor_column: ClassVar[Any | None] = None
 
+    @classmethod
+    def __init_subclass__(cls, **kwargs: Any) -> None:
+        super().__init_subclass__(**kwargs)
+        if "model" not in cls.__dict__:
+            return
+        model: type[DeclarativeBase] = cls.__dict__["model"]
+        pk_key = model.__mapper__.primary_key[0].key
+        assert pk_key is not None
+        pk_col = getattr(model, pk_key)
+
+        raw_fields: Sequence[SearchFieldType] | None = cls.__dict__.get(
+            "searchable_fields", None
+        )
+        if raw_fields is None:
+            cls.searchable_fields = [pk_col]
+        else:
+            if not any(
+                not isinstance(f, tuple) and f.key == pk_key for f in raw_fields
+            ):
+                cls.searchable_fields = [pk_col, *raw_fields]
+
     @classmethod
     def _resolve_load_options(
-        cls, load_options: list[ExecutableOption] | None
+        cls, load_options: Sequence[ExecutableOption] | None
-    ) -> list[ExecutableOption] | None:
+    ) -> Sequence[ExecutableOption] | None:
         """Return load_options if provided, else fall back to default_load_options."""
         if load_options is not None:
             return load_options
@@ -361,7 +418,7 @@ class AsyncCrud(Generic[ModelType]):
         joins: JoinType | None = None,
         outer_join: bool = False,
         with_for_update: bool = False,
-        load_options: list[ExecutableOption] | None = None,
+        load_options: Sequence[ExecutableOption] | None = None,
         schema: type[SchemaType],
     ) -> Response[SchemaType]: ...
 
@@ -375,7 +432,7 @@ class AsyncCrud(Generic[ModelType]):
         joins: JoinType | None = None,
         outer_join: bool = False,
         with_for_update: bool = False,
-        load_options: list[ExecutableOption] | None = None,
+        load_options: Sequence[ExecutableOption] | None = None,
         schema: None = ...,
     ) -> ModelType: ...
 
@@ -388,7 +445,7 @@ class AsyncCrud(Generic[ModelType]):
         joins: JoinType | None = None,
         outer_join: bool = False,
         with_for_update: bool = False,
-        load_options: list[ExecutableOption] | None = None,
+        load_options: Sequence[ExecutableOption] | None = None,
         schema: type[BaseModel] | None = None,
     ) -> ModelType | Response[Any]:
         """Get exactly one record. Raises NotFoundError if not found.
@@ -410,6 +467,82 @@ class AsyncCrud(Generic[ModelType]):
             NotFoundError: If no record found
             MultipleResultsFound: If more than one record found
         """
+        result = await cls.get_or_none(
+            session,
+            filters,
+            joins=joins,
+            outer_join=outer_join,
+            with_for_update=with_for_update,
+            load_options=load_options,
+            schema=schema,
+        )
+        if result is None:
+            raise NotFoundError()
+        return result
+
+    @overload
+    @classmethod
+    async def get_or_none(  # pragma: no cover
+        cls: type[Self],
+        session: AsyncSession,
+        filters: list[Any],
+        *,
+        joins: JoinType | None = None,
+        outer_join: bool = False,
+        with_for_update: bool = False,
+        load_options: Sequence[ExecutableOption] | None = None,
+        schema: type[SchemaType],
+    ) -> Response[SchemaType] | None: ...
+
+    @overload
+    @classmethod
+    async def get_or_none(  # pragma: no cover
+        cls: type[Self],
+        session: AsyncSession,
+        filters: list[Any],
+        *,
+        joins: JoinType | None = None,
+        outer_join: bool = False,
+        with_for_update: bool = False,
+        load_options: Sequence[ExecutableOption] | None = None,
+        schema: None = ...,
+    ) -> ModelType | None: ...
+
+    @classmethod
+    async def get_or_none(
+        cls: type[Self],
+        session: AsyncSession,
+        filters: list[Any],
+        *,
+        joins: JoinType | None = None,
+        outer_join: bool = False,
+        with_for_update: bool = False,
+        load_options: Sequence[ExecutableOption] | None = None,
+        schema: type[BaseModel] | None = None,
+    ) -> ModelType | Response[Any] | None:
+        """Get exactly one record, or ``None`` if not found.
+
+        Like :meth:`get` but returns ``None`` instead of raising
+        :class:`~fastapi_toolsets.exceptions.NotFoundError` when no record
+        matches the filters.
+
+        Args:
+            session: DB async session
+            filters: List of SQLAlchemy filter conditions
+            joins: List of (model, condition) tuples for joining related tables
+            outer_join: Use LEFT OUTER JOIN instead of INNER JOIN
+            with_for_update: Lock the row for update
+            load_options: SQLAlchemy loader options (e.g., selectinload)
+            schema: Pydantic schema to serialize the result into. When provided,
+                the result is automatically wrapped in a ``Response[schema]``.
+
+        Returns:
+            Model instance, ``Response[schema]`` when ``schema`` is given,
+            or ``None`` when no record matches.
+
+        Raises:
+            MultipleResultsFound: If more than one record found
+        """
         q = select(cls.model)
         q = _apply_joins(q, joins, outer_join)
         q = q.where(and_(*filters))
@@ -419,12 +552,40 @@ class AsyncCrud(Generic[ModelType]):
             q = q.with_for_update()
         result = await session.execute(q)
         item = result.unique().scalar_one_or_none()
-        if not item:
+        if item is None:
-            raise NotFoundError()
+            return None
-        result = cast(ModelType, item)
+        db_model = cast(ModelType, item)
         if schema:
-            return Response(data=schema.model_validate(result))
+            return Response(data=schema.model_validate(db_model))
-        return result
+        return db_model
+
+    @overload
+    @classmethod
+    async def first(  # pragma: no cover
+        cls: type[Self],
+        session: AsyncSession,
+        filters: list[Any] | None = None,
+        *,
+        joins: JoinType | None = None,
+        outer_join: bool = False,
+        with_for_update: bool = False,
+        load_options: Sequence[ExecutableOption] | None = None,
+        schema: type[SchemaType],
+    ) -> Response[SchemaType] | None: ...
+
+    @overload
+    @classmethod
+    async def first(  # pragma: no cover
+        cls: type[Self],
+        session: AsyncSession,
+        filters: list[Any] | None = None,
+        *,
+        joins: JoinType | None = None,
+        outer_join: bool = False,
+        with_for_update: bool = False,
+        load_options: Sequence[ExecutableOption] | None = None,
+        schema: None = ...,
+    ) -> ModelType | None: ...
 
     @classmethod
     async def first(
@@ -434,8 +595,10 @@ class AsyncCrud(Generic[ModelType]):
         *,
         joins: JoinType | None = None,
         outer_join: bool = False,
-        load_options: list[ExecutableOption] | None = None,
+        with_for_update: bool = False,
-    ) -> ModelType | None:
+        load_options: Sequence[ExecutableOption] | None = None,
+        schema: type[BaseModel] | None = None,
+    ) -> ModelType | Response[Any] | None:
         """Get the first matching record, or None.
 
         Args:
@@ -443,10 +606,14 @@ class AsyncCrud(Generic[ModelType]):
             filters: List of SQLAlchemy filter conditions
             joins: List of (model, condition) tuples for joining related tables
             outer_join: Use LEFT OUTER JOIN instead of INNER JOIN
-            load_options: SQLAlchemy loader options
+            with_for_update: Lock the row for update
+            load_options: SQLAlchemy loader options (e.g., selectinload)
+            schema: Pydantic schema to serialize the result into. When provided,
+                the result is automatically wrapped in a ``Response[schema]``.
 
         Returns:
-            Model instance or None
+            Model instance, ``Response[schema]`` when ``schema`` is given,
+            or ``None`` when no record matches.
         """
         q = select(cls.model)
         q = _apply_joins(q, joins, outer_join)
@@ -454,8 +621,16 @@ class AsyncCrud(Generic[ModelType]):
             q = q.where(and_(*filters))
         if resolved := cls._resolve_load_options(load_options):
             q = q.options(*resolved)
+        if with_for_update:
+            q = q.with_for_update()
         result = await session.execute(q)
-        return cast(ModelType | None, result.unique().scalars().first())
+        item = result.unique().scalars().first()
+        if item is None:
+            return None
+        db_model = cast(ModelType, item)
+        if schema:
+            return Response(data=schema.model_validate(db_model))
+        return db_model
 
     @classmethod
     async def get_multi(
@@ -465,7 +640,7 @@ class AsyncCrud(Generic[ModelType]):
         filters: list[Any] | None = None,
         joins: JoinType | None = None,
         outer_join: bool = False,
-        load_options: list[ExecutableOption] | None = None,
+        load_options: Sequence[ExecutableOption] | None = None,
         order_by: OrderByClause | None = None,
         limit: int | None = None,
         offset: int | None = None,
@@ -674,8 +849,10 @@ class AsyncCrud(Generic[ModelType]):
             ``None``, or ``Response[None]`` when ``return_response=True``.
         """
         async with get_transaction(session):
-            q = sql_delete(cls.model).where(and_(*filters))
+            result = await session.execute(select(cls.model).where(and_(*filters)))
-            await session.execute(q)
+            objects = result.scalars().all()
+            for obj in objects:
+                await session.delete(obj)
         if return_response:
             return Response(data=None)
         return None
@@ -741,7 +918,7 @@ class AsyncCrud(Generic[ModelType]):
         filters: list[Any] | None = None,
         joins: JoinType | None = None,
         outer_join: bool = False,
-        load_options: list[ExecutableOption] | None = None,
+        load_options: Sequence[ExecutableOption] | None = None,
         order_by: OrderByClause | None = None,
         page: int = 1,
         items_per_page: int = 20,
@@ -750,7 +927,7 @@ class AsyncCrud(Generic[ModelType]):
         facet_fields: Sequence[FacetFieldType] | None = None,
         filter_by: dict[str, Any] | BaseModel | None = None,
         schema: type[BaseModel],
-    ) -> PaginatedResponse[Any]:
+    ) -> OffsetPaginatedResponse[Any]:
         """Get paginated results using offset-based pagination.
 
         Args:
@@ -832,7 +1009,7 @@ class AsyncCrud(Generic[ModelType]):
             session, facet_fields, filters, search_joins
         )
 
-        return PaginatedResponse(
+        return OffsetPaginatedResponse(
             data=items,
             pagination=OffsetPagination(
                 total_count=total_count,
@@ -852,7 +1029,7 @@ class AsyncCrud(Generic[ModelType]):
         filters: list[Any] | None = None,
         joins: JoinType | None = None,
         outer_join: bool = False,
-        load_options: list[ExecutableOption] | None = None,
+        load_options: Sequence[ExecutableOption] | None = None,
         order_by: OrderByClause | None = None,
         items_per_page: int = 20,
         search: str | SearchConfig | None = None,
@@ -860,7 +1037,7 @@ class AsyncCrud(Generic[ModelType]):
         facet_fields: Sequence[FacetFieldType] | None = None,
         filter_by: dict[str, Any] | BaseModel | None = None,
         schema: type[BaseModel],
-    ) -> PaginatedResponse[Any]:
+    ) -> CursorPaginatedResponse[Any]:
         """Get paginated results using cursor-based pagination.
 
         Args:
@@ -899,26 +1076,15 @@ class AsyncCrud(Generic[ModelType]):
         cursor_column: Any = cls.cursor_column
         cursor_col_name: str = cursor_column.key
 
+        direction = _CursorDirection.NEXT
         if cursor is not None:
-            raw_val = _decode_cursor(cursor)
+            raw_val, direction = _decode_cursor(cursor)
             col_type = cursor_column.property.columns[0].type
-            if isinstance(col_type, Integer):
+            cursor_val: Any = _parse_cursor_value(raw_val, col_type)
-                cursor_val: Any = int(raw_val)
+            if direction is _CursorDirection.PREV:
-            elif isinstance(col_type, Uuid):
+                filters.append(cursor_column < cursor_val)
-                cursor_val = uuid_module.UUID(raw_val)
-            elif isinstance(col_type, DateTime):
-                cursor_val = datetime.fromisoformat(raw_val)
-            elif isinstance(col_type, Date):
-                cursor_val = date.fromisoformat(raw_val)
-            elif isinstance(col_type, (Float, Numeric)):
-                cursor_val = Decimal(raw_val)
             else:
-                raise ValueError(
+                filters.append(cursor_column > cursor_val)
-                    f"Unsupported cursor column type: {type(col_type).__name__!r}. "
-                    "Supported types: Integer, BigInteger, SmallInteger, Uuid, "
-                    "DateTime, Date, Float, Numeric."
-                )
-            filters.append(cursor_column > cursor_val)
 
         # Build search filters
         if search:
@@ -945,12 +1111,15 @@ class AsyncCrud(Generic[ModelType]):
         if resolved := cls._resolve_load_options(load_options):
             q = q.options(*resolved)
 
-        # Cursor column is always the primary sort
+        # Cursor column is always the primary sort; reverse direction for prev traversal
-        q = q.order_by(cursor_column)
+        if direction is _CursorDirection.PREV:
+            q = q.order_by(cursor_column.desc())
+        else:
+            q = q.order_by(cursor_column)
         if order_by is not None:
             q = q.order_by(order_by)
 
-        # Fetch one extra to detect whether a next page exists
+        # Fetch one extra to detect whether another page exists in this direction
         q = q.limit(items_per_page + 1)
         result = await session.execute(q)
         raw_items = cast(list[ModelType], result.unique().scalars().all())
@@ -958,15 +1127,36 @@ class AsyncCrud(Generic[ModelType]):
         has_more = len(raw_items) > items_per_page
         items_page = raw_items[:items_per_page]
 
-        # next_cursor points past the last item on this page
+        # Restore ascending order when traversing backward
-        next_cursor: str | None = None
+        if direction is _CursorDirection.PREV:
-        if has_more and items_page:
+            items_page = list(reversed(items_page))
-            next_cursor = _encode_cursor(getattr(items_page[-1], cursor_col_name))
 
-        # prev_cursor points to the first item on this page or None when on the first page
+        # next_cursor: points past the last item in ascending order
+        next_cursor: str | None = None
+        if direction is _CursorDirection.NEXT:
+            if has_more and items_page:
+                next_cursor = _encode_cursor(
+                    getattr(items_page[-1], cursor_col_name),
+                    direction=_CursorDirection.NEXT,
+                )
+        else:
+            # Going backward: always provide a next_cursor to allow returning forward
+            if items_page:
+                next_cursor = _encode_cursor(
+                    getattr(items_page[-1], cursor_col_name),
+                    direction=_CursorDirection.NEXT,
+                )
+
+        # prev_cursor: points before the first item in ascending order
         prev_cursor: str | None = None
-        if cursor is not None and items_page:
+        if direction is _CursorDirection.NEXT and cursor is not None and items_page:
-            prev_cursor = _encode_cursor(getattr(items_page[0], cursor_col_name))
+            prev_cursor = _encode_cursor(
+                getattr(items_page[0], cursor_col_name), direction=_CursorDirection.PREV
+            )
+        elif direction is _CursorDirection.PREV and has_more and items_page:
+            prev_cursor = _encode_cursor(
+                getattr(items_page[0], cursor_col_name), direction=_CursorDirection.PREV
+            )
 
         items: list[Any] = [schema.model_validate(item) for item in items_page]
 
@@ -974,7 +1164,7 @@ class AsyncCrud(Generic[ModelType]):
             session, facet_fields, filters, search_joins
         )
 
-        return PaginatedResponse(
+        return CursorPaginatedResponse(
             data=items,
             pagination=CursorPagination(
                 next_cursor=next_cursor,
@@ -985,21 +1175,163 @@ class AsyncCrud(Generic[ModelType]):
             filter_attributes=filter_attributes,
         )
 
+    @overload
+    @classmethod
+    async def paginate(  # pragma: no cover
+        cls: type[Self],
+        session: AsyncSession,
+        *,
+        pagination_type: Literal[PaginationType.OFFSET],
+        filters: list[Any] | None = ...,
+        joins: JoinType | None = ...,
+        outer_join: bool = ...,
+        load_options: Sequence[ExecutableOption] | None = ...,
+        order_by: OrderByClause | None = ...,
+        page: int = ...,
+        cursor: str | None = ...,
+        items_per_page: int = ...,
+        search: str | SearchConfig | None = ...,
+        search_fields: Sequence[SearchFieldType] | None = ...,
+        facet_fields: Sequence[FacetFieldType] | None = ...,
+        filter_by: dict[str, Any] | BaseModel | None = ...,
+        schema: type[BaseModel],
+    ) -> OffsetPaginatedResponse[Any]: ...
+
+    @overload
+    @classmethod
+    async def paginate(  # pragma: no cover
+        cls: type[Self],
+        session: AsyncSession,
+        *,
+        pagination_type: Literal[PaginationType.CURSOR],
+        filters: list[Any] | None = ...,
+        joins: JoinType | None = ...,
+        outer_join: bool = ...,
+        load_options: Sequence[ExecutableOption] | None = ...,
+        order_by: OrderByClause | None = ...,
+        page: int = ...,
+        cursor: str | None = ...,
+        items_per_page: int = ...,
+        search: str | SearchConfig | None = ...,
+        search_fields: Sequence[SearchFieldType] | None = ...,
+        facet_fields: Sequence[FacetFieldType] | None = ...,
+        filter_by: dict[str, Any] | BaseModel | None = ...,
+        schema: type[BaseModel],
+    ) -> CursorPaginatedResponse[Any]: ...
+
+    @classmethod
+    async def paginate(
+        cls: type[Self],
+        session: AsyncSession,
+        *,
+        pagination_type: PaginationType = PaginationType.OFFSET,
+        filters: list[Any] | None = None,
+        joins: JoinType | None = None,
+        outer_join: bool = False,
+        load_options: Sequence[ExecutableOption] | None = None,
+        order_by: OrderByClause | None = None,
+        page: int = 1,
+        cursor: str | None = None,
+        items_per_page: int = 20,
+        search: str | SearchConfig | None = None,
+        search_fields: Sequence[SearchFieldType] | None = None,
+        facet_fields: Sequence[FacetFieldType] | None = None,
+        filter_by: dict[str, Any] | BaseModel | None = None,
+        schema: type[BaseModel],
+    ) -> OffsetPaginatedResponse[Any] | CursorPaginatedResponse[Any]:
+        """Get paginated results using either offset or cursor pagination.
+
+        Args:
+            session: DB async session.
+            pagination_type: Pagination strategy.  Defaults to
+                ``PaginationType.OFFSET``.
+            filters: List of SQLAlchemy filter conditions.
+            joins: List of ``(model, condition)`` tuples for joining related
+                tables.
+            outer_join: Use LEFT OUTER JOIN instead of INNER JOIN.
+            load_options: SQLAlchemy loader options.  Falls back to
+                ``default_load_options`` when not provided.
+            order_by: Column or expression to order results by.
+            page: Page number (1-indexed).  Only used when
+                ``pagination_type`` is ``OFFSET``.
+            cursor: Cursor token from a previous
+                :class:`.CursorPaginatedResponse`.  Only used when
+                ``pagination_type`` is ``CURSOR``.
+            items_per_page: Number of items per page (default 20).
+            search: Search query string or :class:`.SearchConfig` object.
+            search_fields: Fields to search in (overrides class default).
+            facet_fields: Columns to compute distinct values for (overrides
+                class default).
+            filter_by: Dict of ``{column_key: value}`` to filter by declared
+                facet fields.  Keys must match the ``column.key`` of a facet
+                field.  Scalar → equality, list → IN clause.  Raises
+                :exc:`.InvalidFacetFilterError` for unknown keys.
+            schema: Pydantic schema to serialize each item into.
+
+        Returns:
+            :class:`.OffsetPaginatedResponse` when ``pagination_type`` is
+            ``OFFSET``, :class:`.CursorPaginatedResponse` when it is
+            ``CURSOR``.
+        """
+        if items_per_page < 1:
+            raise ValueError(f"items_per_page must be >= 1, got {items_per_page}")
+        match pagination_type:
+            case PaginationType.CURSOR:
+                return await cls.cursor_paginate(
+                    session,
+                    cursor=cursor,
+                    filters=filters,
+                    joins=joins,
+                    outer_join=outer_join,
+                    load_options=load_options,
+                    order_by=order_by,
+                    items_per_page=items_per_page,
+                    search=search,
+                    search_fields=search_fields,
+                    facet_fields=facet_fields,
+                    filter_by=filter_by,
+                    schema=schema,
+                )
+            case PaginationType.OFFSET:
+                if page < 1:
+                    raise ValueError(f"page must be >= 1, got {page}")
+                return await cls.offset_paginate(
+                    session,
+                    filters=filters,
+                    joins=joins,
+                    outer_join=outer_join,
+                    load_options=load_options,
+                    order_by=order_by,
+                    page=page,
+                    items_per_page=items_per_page,
+                    search=search,
+                    search_fields=search_fields,
+                    facet_fields=facet_fields,
+                    filter_by=filter_by,
+                    schema=schema,
+                )
+            case _:
+                raise ValueError(f"Unknown pagination_type: {pagination_type!r}")
+
 
 def CrudFactory(
     model: type[ModelType],
     *,
+    base_class: type[AsyncCrud[Any]] = AsyncCrud,
     searchable_fields: Sequence[SearchFieldType] | None = None,
     facet_fields: Sequence[FacetFieldType] | None = None,
     order_fields: Sequence[QueryableAttribute[Any]] | None = None,
     m2m_fields: M2MFieldType | None = None,
-    default_load_options: list[ExecutableOption] | None = None,
+    default_load_options: Sequence[ExecutableOption] | None = None,
     cursor_column: Any | None = None,
 ) -> type[AsyncCrud[ModelType]]:
     """Create a CRUD class for a specific model.
 
     Args:
         model: SQLAlchemy model class
+        base_class: Optional base class to inherit from instead of ``AsyncCrud``.
+            Use this to share custom methods across multiple CRUD classes while
+            still using the factory shorthand.
         searchable_fields: Optional list of searchable fields
         facet_fields: Optional list of columns to compute distinct values for in paginated
             responses. Supports direct columns (``User.status``) and relationship tuples
@@ -1090,11 +1422,24 @@ def CrudFactory(
             joins=[(Post, Post.user_id == User.id)],
             outer_join=True,
         )
+
+        # With a shared custom base class:
+        from typing import Generic, TypeVar
+        from sqlalchemy.orm import DeclarativeBase
+
+        T = TypeVar("T", bound=DeclarativeBase)
+
+        class AuditedCrud(AsyncCrud[T], Generic[T]):
+            @classmethod
+            async def get_active(cls, session):
+                return await cls.get_multi(session, filters=[cls.model.is_active == True])
+
+        UserCrud = CrudFactory(User, base_class=AuditedCrud)
         ```
     """
     cls = type(
         f"Async{model.__name__}Crud",
-        (AsyncCrud,),
+        (base_class,),
         {
             "model": model,
             "searchable_fields": searchable_fields,

src/fastapi_toolsets/dependencies.py

@@ -1,10 +1,12 @@
 """Dependency factories for FastAPI routes."""
 
 import inspect
+import typing
 from collections.abc import Callable
 from typing import Any, cast
 
 from fastapi import Depends
+from fastapi.params import Depends as DependsClass
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from .crud import CrudFactory
@@ -13,6 +15,15 @@ from .types import ModelType, SessionDependency
 __all__ = ["BodyDependency", "PathDependency"]
 
 
+def _unwrap_session_dep(session_dep: SessionDependency) -> Callable[..., Any]:
+    """Extract the plain callable from ``Annotated[AsyncSession, Depends(fn)]`` if needed."""
+    if typing.get_origin(session_dep) is typing.Annotated:
+        for arg in typing.get_args(session_dep)[1:]:
+            if isinstance(arg, DependsClass):
+                return arg.dependency
+    return session_dep
+
+
 def PathDependency(
     model: type[ModelType],
     field: Any,
@@ -44,6 +55,7 @@ def PathDependency(
         ): ...
         ```
     """
+    session_callable = _unwrap_session_dep(session_dep)
     crud = CrudFactory(model)
     name = (
         param_name
@@ -53,7 +65,7 @@ def PathDependency(
     python_type = field.type.python_type
 
     async def dependency(
-        session: AsyncSession = Depends(session_dep), **kwargs: Any
+        session: AsyncSession = Depends(session_callable), **kwargs: Any
     ) -> ModelType:
         value = kwargs[name]
         return await crud.get(session, filters=[field == value])
@@ -70,7 +82,7 @@ def PathDependency(
                     "session",
                     inspect.Parameter.KEYWORD_ONLY,
                     annotation=AsyncSession,
-                    default=Depends(session_dep),
+                    default=Depends(session_callable),
                 ),
             ]
         ),
@@ -112,11 +124,12 @@ def BodyDependency(
         ): ...
         ```
     """
+    session_callable = _unwrap_session_dep(session_dep)
     crud = CrudFactory(model)
     python_type = field.type.python_type
 
     async def dependency(
-        session: AsyncSession = Depends(session_dep), **kwargs: Any
+        session: AsyncSession = Depends(session_callable), **kwargs: Any
     ) -> ModelType:
         value = kwargs[body_field]
         return await crud.get(session, filters=[field == value])
@@ -133,7 +146,7 @@ def BodyDependency(
                     "session",
                     inspect.Parameter.KEYWORD_ONLY,
                     annotation=AsyncSession,
-                    default=Depends(session_dep),
+                    default=Depends(session_callable),
                 ),
             ]
         ),

src/fastapi_toolsets/models.py

@@ -3,11 +3,12 @@
 import uuid
 from datetime import datetime
 
-from sqlalchemy import DateTime, Uuid, func, text
+from sqlalchemy import DateTime, Uuid, text
 from sqlalchemy.orm import Mapped, mapped_column
 
 __all__ = [
     "UUIDMixin",
+    "UUIDv7Mixin",
     "CreatedAtMixin",
     "UpdatedAtMixin",
     "TimestampMixin",
@@ -24,12 +25,22 @@ class UUIDMixin:
     )
 
 
+class UUIDv7Mixin:
+    """Mixin that adds a UUIDv7 primary key auto-generated by the database."""
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        Uuid,
+        primary_key=True,
+        server_default=text("uuidv7()"),
+    )
+
+
 class CreatedAtMixin:
     """Mixin that adds a ``created_at`` timestamp column."""
 
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True),
-        server_default=func.now(),
+        server_default=text("clock_timestamp()"),
     )
 
 
@@ -38,8 +49,8 @@ class UpdatedAtMixin:
 
     updated_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True),
-        server_default=func.now(),
+        server_default=text("clock_timestamp()"),
-        onupdate=func.now(),
+        onupdate=text("clock_timestamp()"),
     )
 
 

src/fastapi_toolsets/schemas.py

@@ -1,18 +1,21 @@
 """Base Pydantic schemas for API responses."""
 
 from enum import Enum
-from typing import Any, ClassVar, Generic
+from typing import Annotated, Any, ClassVar, Generic, Literal, TypeVar, Union
 
-from pydantic import BaseModel, ConfigDict
+from pydantic import BaseModel, ConfigDict, Field
 
 from .types import DataT
 
 __all__ = [
     "ApiError",
     "CursorPagination",
+    "CursorPaginatedResponse",
     "ErrorResponse",
     "OffsetPagination",
+    "OffsetPaginatedResponse",
     "PaginatedResponse",
+    "PaginationType",
     "PydanticBase",
     "Response",
     "ResponseStatus",
@@ -123,9 +126,66 @@ class CursorPagination(PydanticBase):
     has_more: bool
 
 
+class PaginationType(str, Enum):
+    """Pagination strategy selector for :meth:`.AsyncCrud.paginate`."""
+
+    OFFSET = "offset"
+    CURSOR = "cursor"
+
+
 class PaginatedResponse(BaseResponse, Generic[DataT]):
-    """Paginated API response for list endpoints."""
+    """Paginated API response for list endpoints.
+
+    Base class and return type for endpoints that support both pagination
+    strategies.  Use :class:`OffsetPaginatedResponse` or
+    :class:`CursorPaginatedResponse` when the strategy is fixed.
+
+    When used as ``PaginatedResponse[T]`` in a return annotation, subscripting
+    returns ``Annotated[Union[CursorPaginatedResponse[T], OffsetPaginatedResponse[T]], Field(discriminator="pagination_type")]``
+    so FastAPI emits a proper ``oneOf`` + discriminator in the OpenAPI schema.
+    """
 
     data: list[DataT]
     pagination: OffsetPagination | CursorPagination
+    pagination_type: PaginationType | None = None
     filter_attributes: dict[str, list[Any]] | None = None
+
+    _discriminated_union_cache: ClassVar[dict[Any, Any]] = {}
+
+    def __class_getitem__(  # type: ignore[invalid-method-override]
+        cls, item: type[Any] | tuple[type[Any], ...]
+    ) -> type[Any]:
+        if cls is PaginatedResponse and not isinstance(item, TypeVar):
+            cached = cls._discriminated_union_cache.get(item)
+            if cached is None:
+                cached = Annotated[
+                    Union[CursorPaginatedResponse[item], OffsetPaginatedResponse[item]],  # type: ignore[invalid-type-form]
+                    Field(discriminator="pagination_type"),
+                ]
+                cls._discriminated_union_cache[item] = cached
+            return cached  # type: ignore[invalid-return-type]
+        return super().__class_getitem__(item)
+
+
+class OffsetPaginatedResponse(PaginatedResponse[DataT]):
+    """Paginated response with typed offset-based pagination metadata.
+
+    The ``pagination_type`` field is always ``"offset"`` and acts as a
+    discriminator, allowing frontend clients to narrow the union type returned
+    by a unified ``paginate()`` endpoint.
+    """
+
+    pagination: OffsetPagination
+    pagination_type: Literal[PaginationType.OFFSET] = PaginationType.OFFSET
+
+
+class CursorPaginatedResponse(PaginatedResponse[DataT]):
+    """Paginated response with typed cursor-based pagination metadata.
+
+    The ``pagination_type`` field is always ``"cursor"`` and acts as a
+    discriminator, allowing frontend clients to narrow the union type returned
+    by a unified ``paginate()`` endpoint.
+    """
+
+    pagination: CursorPagination
+    pagination_type: Literal[PaginationType.CURSOR] = PaginationType.CURSOR

src/fastapi_toolsets/security/__init__.py

@@ -0,0 +1,24 @@
+"""Authentication helpers for FastAPI using Security()."""
+
+from .abc import AuthSource
+from .oauth import (
+    oauth_build_authorization_redirect,
+    oauth_decode_state,
+    oauth_encode_state,
+    oauth_fetch_userinfo,
+    oauth_resolve_provider_urls,
+)
+from .sources import APIKeyHeaderAuth, BearerTokenAuth, CookieAuth, MultiAuth
+
+__all__ = [
+    "APIKeyHeaderAuth",
+    "AuthSource",
+    "BearerTokenAuth",
+    "CookieAuth",
+    "MultiAuth",
+    "oauth_build_authorization_redirect",
+    "oauth_decode_state",
+    "oauth_encode_state",
+    "oauth_fetch_userinfo",
+    "oauth_resolve_provider_urls",
+]

src/fastapi_toolsets/security/abc.py

@@ -0,0 +1,53 @@
+"""Abstract base class for authentication sources."""
+
+import inspect
+from abc import ABC, abstractmethod
+from typing import Any, Callable
+
+from fastapi import Request
+from fastapi.security import SecurityScopes
+
+from fastapi_toolsets.exceptions import UnauthorizedError
+
+
+def _ensure_async(fn: Callable[..., Any]) -> Callable[..., Any]:
+    """Wrap *fn* so it can always be awaited, caching the coroutine check at init time."""
+    if inspect.iscoroutinefunction(fn):
+        return fn
+
+    async def wrapper(*args: Any, **kwargs: Any) -> Any:
+        return fn(*args, **kwargs)
+
+    return wrapper
+
+
+class AuthSource(ABC):
+    """Abstract base class for authentication sources."""
+
+    def __init__(self) -> None:
+        """Set up the default FastAPI dependency signature."""
+        source = self
+
+        async def _call(
+            request: Request,
+            security_scopes: SecurityScopes,  # noqa: ARG001
+        ) -> Any:
+            credential = await source.extract(request)
+            if credential is None:
+                raise UnauthorizedError()
+            return await source.authenticate(credential)
+
+        self._call_fn: Callable[..., Any] = _call
+        self.__signature__ = inspect.signature(_call)
+
+    @abstractmethod
+    async def extract(self, request: Request) -> str | None:
+        """Extract the raw credential from the request without validating."""
+
+    @abstractmethod
+    async def authenticate(self, credential: str) -> Any:
+        """Validate a credential and return the authenticated identity."""
+
+    async def __call__(self, **kwargs: Any) -> Any:
+        """FastAPI dependency dispatch."""
+        return await self._call_fn(**kwargs)

src/fastapi_toolsets/security/oauth.py

@@ -0,0 +1,140 @@
+"""OAuth 2.0 / OIDC helper utilities."""
+
+import base64
+from typing import Any
+from urllib.parse import urlencode
+
+import httpx
+from fastapi.responses import RedirectResponse
+
+_discovery_cache: dict[str, dict] = {}
+
+
+async def oauth_resolve_provider_urls(
+    discovery_url: str,
+) -> tuple[str, str, str | None]:
+    """Fetch the OIDC discovery document and return endpoint URLs.
+
+    Args:
+        discovery_url: URL of the provider's ``/.well-known/openid-configuration``.
+
+    Returns:
+        A ``(authorization_url, token_url, userinfo_url)`` tuple.
+        *userinfo_url* is ``None`` when the provider does not advertise one.
+    """
+    if discovery_url not in _discovery_cache:
+        async with httpx.AsyncClient() as client:
+            resp = await client.get(discovery_url)
+            resp.raise_for_status()
+            _discovery_cache[discovery_url] = resp.json()
+    cfg = _discovery_cache[discovery_url]
+    return (
+        cfg["authorization_endpoint"],
+        cfg["token_endpoint"],
+        cfg.get("userinfo_endpoint"),
+    )
+
+
+async def oauth_fetch_userinfo(
+    *,
+    token_url: str,
+    userinfo_url: str,
+    code: str,
+    client_id: str,
+    client_secret: str,
+    redirect_uri: str,
+) -> dict[str, Any]:
+    """Exchange an authorization code for tokens and return the userinfo payload.
+
+    Performs the two-step OAuth 2.0 / OIDC token exchange:
+
+    1. POSTs the authorization *code* to *token_url* to obtain an access token.
+    2. GETs *userinfo_url* using that access token as a Bearer credential.
+
+    Args:
+        token_url: Provider's token endpoint.
+        userinfo_url: Provider's userinfo endpoint.
+        code: Authorization code received from the provider's callback.
+        client_id: OAuth application client ID.
+        client_secret: OAuth application client secret.
+        redirect_uri: Redirect URI that was used in the authorization request.
+
+    Returns:
+        The JSON payload returned by the userinfo endpoint as a plain ``dict``.
+    """
+    async with httpx.AsyncClient() as client:
+        token_resp = await client.post(
+            token_url,
+            data={
+                "grant_type": "authorization_code",
+                "code": code,
+                "client_id": client_id,
+                "client_secret": client_secret,
+                "redirect_uri": redirect_uri,
+            },
+            headers={"Accept": "application/json"},
+        )
+        token_resp.raise_for_status()
+        access_token = token_resp.json()["access_token"]
+
+        userinfo_resp = await client.get(
+            userinfo_url,
+            headers={"Authorization": f"Bearer {access_token}"},
+        )
+        userinfo_resp.raise_for_status()
+        return userinfo_resp.json()
+
+
+def oauth_build_authorization_redirect(
+    authorization_url: str,
+    *,
+    client_id: str,
+    scopes: str,
+    redirect_uri: str,
+    destination: str,
+) -> RedirectResponse:
+    """Return an OAuth 2.0 authorization ``RedirectResponse``.
+
+    Args:
+        authorization_url: Provider's authorization endpoint.
+        client_id: OAuth application client ID.
+        scopes: Space-separated list of requested scopes.
+        redirect_uri: URI the provider should redirect back to after authorization.
+        destination: URL the user should be sent to after the full OAuth flow
+            completes (encoded as ``state``).
+
+    Returns:
+        A :class:`~fastapi.responses.RedirectResponse` to the provider's
+        authorization page.
+    """
+    params = urlencode(
+        {
+            "client_id": client_id,
+            "response_type": "code",
+            "scope": scopes,
+            "redirect_uri": redirect_uri,
+            "state": oauth_encode_state(destination),
+        }
+    )
+    return RedirectResponse(f"{authorization_url}?{params}")
+
+
+def oauth_encode_state(url: str) -> str:
+    """Base64url-encode a URL to embed as an OAuth ``state`` parameter."""
+    return base64.urlsafe_b64encode(url.encode()).decode()
+
+
+def oauth_decode_state(state: str | None, *, fallback: str) -> str:
+    """Decode a base64url OAuth ``state`` parameter.
+
+    Handles missing padding (some providers strip ``=``).
+    Returns *fallback* if *state* is absent, the literal string ``"null"``,
+    or cannot be decoded.
+    """
+    if not state or state == "null":
+        return fallback
+    try:
+        padded = state + "=" * (4 - len(state) % 4)
+        return base64.urlsafe_b64decode(padded).decode()
+    except Exception:
+        return fallback

src/fastapi_toolsets/security/sources/__init__.py

@@ -0,0 +1,8 @@
+"""Built-in authentication source implementations."""
+
+from .header import APIKeyHeaderAuth
+from .bearer import BearerTokenAuth
+from .cookie import CookieAuth
+from .multi import MultiAuth
+
+__all__ = ["APIKeyHeaderAuth", "BearerTokenAuth", "CookieAuth", "MultiAuth"]

src/fastapi_toolsets/security/sources/bearer.py

@@ -0,0 +1,120 @@
+"""Bearer token authentication source."""
+
+import inspect
+import secrets
+from typing import Annotated, Any, Callable
+
+from fastapi import Depends
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer, SecurityScopes
+
+from fastapi_toolsets.exceptions import UnauthorizedError
+
+from ..abc import AuthSource, _ensure_async
+
+
+class BearerTokenAuth(AuthSource):
+    """Bearer token authentication source.
+
+    Wraps :class:`fastapi.security.HTTPBearer` for OpenAPI documentation.
+    The validator is called as ``await validator(credential, **kwargs)``
+    where ``kwargs`` are the extra keyword arguments provided at instantiation.
+
+    Args:
+        validator: Sync or async callable that receives the credential and any
+            extra keyword arguments, and returns the authenticated identity
+            (e.g. a ``User`` model). Should raise
+            :class:`~fastapi_toolsets.exceptions.UnauthorizedError` on failure.
+        prefix: Optional token prefix (e.g. ``"user_"``). If set, only tokens
+            whose value starts with this prefix are matched. The prefix is
+            **kept** in the value passed to the validator — store and compare
+            tokens with their prefix included. Use :meth:`generate_token` to
+            create correctly-prefixed tokens. This enables multiple
+            ``BearerTokenAuth`` instances in the same app (e.g. ``"user_"``
+            for user tokens, ``"org_"`` for org tokens).
+        **kwargs: Extra keyword arguments forwarded to the validator on every
+            call (e.g. ``role=Role.ADMIN``).
+    """
+
+    def __init__(
+        self,
+        validator: Callable[..., Any],
+        *,
+        prefix: str | None = None,
+        **kwargs: Any,
+    ) -> None:
+        self._validator = _ensure_async(validator)
+        self._prefix = prefix
+        self._kwargs = kwargs
+        self._scheme = HTTPBearer(auto_error=False)
+
+        async def _call(
+            security_scopes: SecurityScopes,  # noqa: ARG001
+            credentials: Annotated[
+                HTTPAuthorizationCredentials | None, Depends(self._scheme)
+            ] = None,
+        ) -> Any:
+            if credentials is None:
+                raise UnauthorizedError()
+            return await self._validate(credentials.credentials)
+
+        self._call_fn = _call
+        self.__signature__ = inspect.signature(_call)
+
+    async def _validate(self, token: str) -> Any:
+        """Check prefix and call the validator."""
+        if self._prefix is not None and not token.startswith(self._prefix):
+            raise UnauthorizedError()
+        return await self._validator(token, **self._kwargs)
+
+    async def extract(self, request: Any) -> str | None:
+        """Extract the raw credential from the request without validating.
+
+        Returns ``None`` if no ``Authorization: Bearer`` header is present,
+        the token is empty, or the token does not match the configured prefix.
+        The prefix is included in the returned value.
+        """
+        auth = request.headers.get("Authorization", "")
+        if not auth.startswith("Bearer "):
+            return None
+        token = auth[7:]
+        if not token:
+            return None
+        if self._prefix is not None and not token.startswith(self._prefix):
+            return None
+        return token
+
+    async def authenticate(self, credential: str) -> Any:
+        """Validate a credential and return the identity.
+
+        Calls ``await validator(credential, **kwargs)`` where ``kwargs`` are
+        the extra keyword arguments provided at instantiation.
+        """
+        return await self._validate(credential)
+
+    def require(self, **kwargs: Any) -> "BearerTokenAuth":
+        """Return a new instance with additional (or overriding) validator kwargs."""
+        return BearerTokenAuth(
+            self._validator,
+            prefix=self._prefix,
+            **{**self._kwargs, **kwargs},
+        )
+
+    def generate_token(self, nbytes: int = 32) -> str:
+        """Generate a secure random token for this auth source.
+
+        Returns a URL-safe random token. If a prefix is configured it is
+        prepended — the returned value is what you store in your database
+        and return to the client as-is.
+
+        Args:
+            nbytes: Number of random bytes before base64 encoding. The
+                resulting string is ``ceil(nbytes * 4 / 3)`` characters
+                (43 chars for the default 32 bytes). Defaults to 32.
+
+        Returns:
+            A ready-to-use token string (e.g. ``"user_Xk3..."``).
+        """
+        token = secrets.token_urlsafe(nbytes)
+        if self._prefix is not None:
+            return f"{self._prefix}{token}"
+        return token

src/fastapi_toolsets/security/sources/cookie.py

@@ -0,0 +1,139 @@
+"""Cookie-based authentication source."""
+
+import base64
+import hashlib
+import hmac
+import inspect
+import json
+import time
+from typing import Annotated, Any, Callable
+
+from fastapi import Depends, Request, Response
+from fastapi.security import APIKeyCookie, SecurityScopes
+
+from fastapi_toolsets.exceptions import UnauthorizedError
+
+from ..abc import AuthSource, _ensure_async
+
+
+class CookieAuth(AuthSource):
+    """Cookie-based authentication source.
+
+    Wraps :class:`fastapi.security.APIKeyCookie` for OpenAPI documentation.
+    Optionally signs the cookie with HMAC-SHA256 to provide stateless, tamper-
+    proof sessions without any database entry.
+
+    Args:
+        name: Cookie name.
+        validator: Sync or async callable that receives the cookie value
+            (plain, after signature verification when ``secret_key`` is set)
+            and any extra keyword arguments, and returns the authenticated
+            identity.
+        secret_key: When provided, the cookie is HMAC-SHA256 signed.
+            :meth:`set_cookie` embeds an expiry and signs the payload;
+            :meth:`extract` verifies the signature and expiry before handing
+            the plain value to the validator.  When ``None`` (default), the raw
+            cookie value is passed to the validator as-is.
+        ttl: Cookie lifetime in seconds (default 24 h).  Only used when
+            ``secret_key`` is set.
+        **kwargs: Extra keyword arguments forwarded to the validator on every
+            call (e.g. ``role=Role.ADMIN``).
+    """
+
+    def __init__(
+        self,
+        name: str,
+        validator: Callable[..., Any],
+        *,
+        secret_key: str | None = None,
+        ttl: int = 86400,
+        **kwargs: Any,
+    ) -> None:
+        self._name = name
+        self._validator = _ensure_async(validator)
+        self._secret_key = secret_key
+        self._ttl = ttl
+        self._kwargs = kwargs
+        self._scheme = APIKeyCookie(name=name, auto_error=False)
+
+        async def _call(
+            security_scopes: SecurityScopes,  # noqa: ARG001
+            value: Annotated[str | None, Depends(self._scheme)] = None,
+        ) -> Any:
+            if value is None:
+                raise UnauthorizedError()
+            plain = self._verify(value)
+            return await self._validator(plain, **self._kwargs)
+
+        self._call_fn = _call
+        self.__signature__ = inspect.signature(_call)
+
+    def _hmac(self, data: str) -> str:
+        if self._secret_key is None:
+            raise RuntimeError("_hmac called without secret_key configured")
+        return hmac.new(
+            self._secret_key.encode(), data.encode(), hashlib.sha256
+        ).hexdigest()
+
+    def _sign(self, value: str) -> str:
+        data = base64.urlsafe_b64encode(
+            json.dumps({"v": value, "exp": int(time.time()) + self._ttl}).encode()
+        ).decode()
+        return f"{data}.{self._hmac(data)}"
+
+    def _verify(self, cookie_value: str) -> str:
+        """Return the plain value, verifying HMAC + expiry when signed."""
+        if not self._secret_key:
+            return cookie_value
+
+        try:
+            data, sig = cookie_value.rsplit(".", 1)
+        except ValueError:
+            raise UnauthorizedError()
+
+        if not hmac.compare_digest(self._hmac(data), sig):
+            raise UnauthorizedError()
+
+        try:
+            payload = json.loads(base64.urlsafe_b64decode(data))
+            value: str = payload["v"]
+            exp: int = payload["exp"]
+        except Exception:
+            raise UnauthorizedError()
+
+        if exp < int(time.time()):
+            raise UnauthorizedError()
+
+        return value
+
+    async def extract(self, request: Request) -> str | None:
+        return request.cookies.get(self._name)
+
+    async def authenticate(self, credential: str) -> Any:
+        plain = self._verify(credential)
+        return await self._validator(plain, **self._kwargs)
+
+    def require(self, **kwargs: Any) -> "CookieAuth":
+        """Return a new instance with additional (or overriding) validator kwargs."""
+        return CookieAuth(
+            self._name,
+            self._validator,
+            secret_key=self._secret_key,
+            ttl=self._ttl,
+            **{**self._kwargs, **kwargs},
+        )
+
+    def set_cookie(self, response: Response, value: str) -> None:
+        """Attach the cookie to *response*, signing it when ``secret_key`` is set."""
+        cookie_value = self._sign(value) if self._secret_key else value
+        response.set_cookie(
+            self._name,
+            cookie_value,
+            httponly=True,
+            samesite="lax",
+            max_age=self._ttl,
+        )
+
+    def delete_cookie(self, response: Response) -> None:
+        """Clear the session cookie (logout)."""
+        response.delete_cookie(self._name, httponly=True, samesite="lax")

src/fastapi_toolsets/security/sources/header.py

@@ -0,0 +1,67 @@
+"""API key header authentication source."""
+
+import inspect
+from typing import Annotated, Any, Callable
+
+from fastapi import Depends, Request
+from fastapi.security import APIKeyHeader, SecurityScopes
+
+from fastapi_toolsets.exceptions import UnauthorizedError
+
+from ..abc import AuthSource, _ensure_async
+
+
+class APIKeyHeaderAuth(AuthSource):
+    """API key header authentication source.
+
+    Wraps :class:`fastapi.security.APIKeyHeader` for OpenAPI documentation.
+    The validator is called as ``await validator(api_key, **kwargs)``
+    where ``kwargs`` are the extra keyword arguments provided at instantiation.
+
+    Args:
+        name: HTTP header name that carries the API key (e.g. ``"X-API-Key"``).
+        validator: Sync or async callable that receives the API key and any
+            extra keyword arguments, and returns the authenticated identity.
+            Should raise :class:`~fastapi_toolsets.exceptions.UnauthorizedError`
+            on failure.
+        **kwargs: Extra keyword arguments forwarded to the validator on every
+            call (e.g. ``role=Role.ADMIN``).
+    """
+
+    def __init__(
+        self,
+        name: str,
+        validator: Callable[..., Any],
+        **kwargs: Any,
+    ) -> None:
+        self._name = name
+        self._validator = _ensure_async(validator)
+        self._kwargs = kwargs
+        self._scheme = APIKeyHeader(name=name, auto_error=False)
+
+        async def _call(
+            security_scopes: SecurityScopes,  # noqa: ARG001
+            api_key: Annotated[str | None, Depends(self._scheme)] = None,
+        ) -> Any:
+            if api_key is None:
+                raise UnauthorizedError()
+            return await self._validator(api_key, **self._kwargs)
+
+        self._call_fn = _call
+        self.__signature__ = inspect.signature(_call)
+
+    async def extract(self, request: Request) -> str | None:
+        """Extract the API key from the configured header."""
+        return request.headers.get(self._name) or None
+
+    async def authenticate(self, credential: str) -> Any:
+        """Validate a credential and return the identity."""
+        return await self._validator(credential, **self._kwargs)
+
+    def require(self, **kwargs: Any) -> "APIKeyHeaderAuth":
+        """Return a new instance with additional (or overriding) validator kwargs."""
+        return APIKeyHeaderAuth(
+            self._name,
+            self._validator,
+            **{**self._kwargs, **kwargs},
+        )

src/fastapi_toolsets/security/sources/multi.py

@@ -0,0 +1,119 @@
+"""MultiAuth: combine multiple authentication sources into a single callable."""
+
+import inspect
+from typing import Any, cast
+
+from fastapi import Request
+from fastapi.security import SecurityScopes
+
+from fastapi_toolsets.exceptions import UnauthorizedError
+
+from ..abc import AuthSource
+
+
+class MultiAuth:
+    """Combine multiple authentication sources into a single callable.
+
+    Sources are tried in order; the first one whose
+    :meth:`~AuthSource.extract` returns a non-``None`` credential wins.
+    Its :meth:`~AuthSource.authenticate` is called and the result returned.
+
+    If a credential is found but the validator raises, the exception propagates
+    immediately — the remaining sources are **not** tried. This prevents
+    silent fallthrough on invalid credentials.
+
+    If no source provides a credential,
+    :class:`~fastapi_toolsets.exceptions.UnauthorizedError` is raised.
+
+    The :meth:`~AuthSource.extract` method of each source performs only
+    string matching (no I/O), so prefix-based dispatch is essentially free.
+
+    Any :class:`~AuthSource` subclass — including user-defined ones — can be
+    passed as a source.
+
+    Args:
+        *sources: Auth source instances to try in order.
+
+    Example::
+
+        user_bearer = BearerTokenAuth(verify_user, prefix="user_")
+        org_bearer  = BearerTokenAuth(verify_org,  prefix="org_")
+        cookie      = CookieAuth("session", verify_session)
+
+        multi = MultiAuth(user_bearer, org_bearer, cookie)
+
+        @app.get("/data")
+        async def data_route(user = Security(multi)):
+            return user
+
+        # Apply a shared requirement to all sources at once
+        @app.get("/admin")
+        async def admin_route(user = Security(multi.require(role=Role.ADMIN))):
+            return user
+    """
+
+    def __init__(self, *sources: AuthSource) -> None:
+        self._sources = sources
+
+        async def _call(
+            request: Request,
+            security_scopes: SecurityScopes,  # noqa: ARG001
+            **kwargs: Any,  # noqa: ARG001  — absorbs scheme values injected by FastAPI
+        ) -> Any:
+            for source in self._sources:
+                credential = await source.extract(request)
+                if credential is not None:
+                    return await source.authenticate(credential)
+            raise UnauthorizedError()
+
+        self._call_fn = _call
+
+        # Build a merged signature that includes the security-scheme Depends()
+        # parameters from every source so FastAPI registers them in OpenAPI docs.
+        seen: set[str] = {"request", "security_scopes"}
+        merged: list[inspect.Parameter] = [
+            inspect.Parameter(
+                "request",
+                inspect.Parameter.POSITIONAL_OR_KEYWORD,
+                annotation=Request,
+            ),
+            inspect.Parameter(
+                "security_scopes",
+                inspect.Parameter.POSITIONAL_OR_KEYWORD,
+                annotation=SecurityScopes,
+            ),
+        ]
+        for i, source in enumerate(sources):
+            for name, param in inspect.signature(source).parameters.items():
+                if name in seen:
+                    continue
+                merged.append(param.replace(name=f"_s{i}_{name}"))
+                seen.add(name)
+        self.__signature__ = inspect.Signature(merged, return_annotation=Any)
+
+    async def __call__(self, **kwargs: Any) -> Any:
+        return await self._call_fn(**kwargs)
+
+    def require(self, **kwargs: Any) -> "MultiAuth":
+        """Return a new :class:`MultiAuth` with kwargs forwarded to each source.
+
+        Calls ``.require(**kwargs)`` on every source that supports it. Sources
+        that do not implement ``.require()`` (e.g. custom :class:`~AuthSource`
+        subclasses) are passed through unchanged.
+
+        New kwargs are merged over each source's existing kwargs — new values
+        win on conflict::
+
+            multi = MultiAuth(bearer, cookie)
+
+            @app.get("/admin")
+            async def admin(user = Security(multi.require(role=Role.ADMIN))):
+                return user
+        """
+        new_sources = tuple(
+            cast(Any, source).require(**kwargs)
+            if hasattr(source, "require")
+            else source
+            for source in self._sources
+        )
+        return MultiAuth(*new_sources)

src/fastapi_toolsets/types.py

@@ -24,4 +24,4 @@ SearchFieldType = InstrumentedAttribute[Any] | tuple[InstrumentedAttribute[Any],
 FacetFieldType = SearchFieldType
 
 # Dependency type aliases
-SessionDependency = Callable[[], AsyncGenerator[AsyncSession, None]]
+SessionDependency = Callable[[], AsyncGenerator[AsyncSession, None]] | Any

tests/test_crud.py

@@ -6,8 +6,8 @@ import pytest
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
 
-from fastapi_toolsets.crud import CrudFactory
+from fastapi_toolsets.crud import CrudFactory, PaginationType
-from fastapi_toolsets.crud.factory import AsyncCrud
+from fastapi_toolsets.crud.factory import AsyncCrud, _CursorDirection
 from fastapi_toolsets.exceptions import NotFoundError
 
 from .conftest import (
@@ -35,6 +35,7 @@ from .conftest import (
     RoleCursorCrud,
     RoleRead,
     RoleUpdate,
+    Tag,
     TagCreate,
     TagCrud,
     User,
@@ -85,6 +86,101 @@ class TestCrudFactory:
         assert crud_with.default_load_options == options
         assert crud_without.default_load_options is None
 
+    def test_base_class_custom_methods_inherited(self):
+        """CrudFactory with base_class inherits custom methods from that base."""
+        from typing import Generic, TypeVar
+
+        from sqlalchemy.orm import DeclarativeBase
+
+        T = TypeVar("T", bound=DeclarativeBase)
+
+        class CustomBase(AsyncCrud[T], Generic[T]):
+            @classmethod
+            def custom_method(cls) -> str:
+                return f"custom:{cls.model.__name__}"
+
+        UserCrudCustom = CrudFactory(User, base_class=CustomBase)
+        PostCrudCustom = CrudFactory(Post, base_class=CustomBase)
+
+        assert issubclass(UserCrudCustom, CustomBase)
+        assert issubclass(PostCrudCustom, CustomBase)
+        assert UserCrudCustom.custom_method() == "custom:User"
+        assert PostCrudCustom.custom_method() == "custom:Post"
+
+    def test_base_class_pk_injected(self):
+        """PK is still injected when using a custom base_class."""
+        from typing import Generic, TypeVar
+
+        from sqlalchemy.orm import DeclarativeBase
+
+        T = TypeVar("T", bound=DeclarativeBase)
+
+        class CustomBase(AsyncCrud[T], Generic[T]):
+            pass
+
+        crud = CrudFactory(User, base_class=CustomBase)
+        assert crud.searchable_fields is not None
+        assert User.id in crud.searchable_fields
+
+
+class TestAsyncCrudSubclass:
+    """Tests for direct AsyncCrud subclassing (alternative to CrudFactory)."""
+
+    def test_subclass_with_model_only(self):
+        """Subclassing with just model auto-injects PK into searchable_fields."""
+
+        class UserCrudDirect(AsyncCrud[User]):
+            model = User
+
+        assert UserCrudDirect.searchable_fields == [User.id]
+
+    def test_subclass_with_explicit_fields_prepends_pk(self):
+        """Subclassing with searchable_fields prepends PK automatically."""
+
+        class UserCrudDirect(AsyncCrud[User]):
+            model = User
+            searchable_fields = [User.username]
+
+        assert UserCrudDirect.searchable_fields == [User.id, User.username]
+
+    def test_subclass_with_pk_already_in_fields(self):
+        """PK is not duplicated when already in searchable_fields."""
+
+        class UserCrudDirect(AsyncCrud[User]):
+            model = User
+            searchable_fields = [User.id, User.username]
+
+        assert UserCrudDirect.searchable_fields == [User.id, User.username]
+
+    def test_subclass_has_default_class_vars(self):
+        """Other ClassVars are None by default on a direct subclass."""
+
+        class UserCrudDirect(AsyncCrud[User]):
+            model = User
+
+        assert UserCrudDirect.facet_fields is None
+        assert UserCrudDirect.default_load_options is None
+        assert UserCrudDirect.cursor_column is None
+
+    def test_subclass_with_load_options(self):
+        """Direct subclass can declare default_load_options."""
+        opts = [selectinload(User.role)]
+
+        class UserCrudDirect(AsyncCrud[User]):
+            model = User
+            default_load_options = opts
+
+        assert UserCrudDirect.default_load_options is opts
+
+    def test_abstract_base_without_model_not_processed(self):
+        """Intermediate abstract class without model is not processed."""
+
+        class AbstractCrud(AsyncCrud[User]):
+            pass
+
+        # Should not raise, and searchable_fields inherits base default (None)
+        assert AbstractCrud.searchable_fields is None
+
 
 class TestResolveLoadOptions:
     """Tests for _resolve_load_options logic."""
@@ -294,6 +390,100 @@ class TestCrudGet:
         assert user.username == "active"
 
 
+class TestCrudGetOrNone:
+    """Tests for CRUD get_or_none operations."""
+
+    @pytest.mark.anyio
+    async def test_returns_record_when_found(self, db_session: AsyncSession):
+        """get_or_none returns the record when it exists."""
+        created = await RoleCrud.create(db_session, RoleCreate(name="admin"))
+        fetched = await RoleCrud.get_or_none(db_session, [Role.id == created.id])
+
+        assert fetched is not None
+        assert fetched.id == created.id
+        assert fetched.name == "admin"
+
+    @pytest.mark.anyio
+    async def test_returns_none_when_not_found(self, db_session: AsyncSession):
+        """get_or_none returns None instead of raising NotFoundError."""
+        result = await RoleCrud.get_or_none(db_session, [Role.id == uuid.uuid4()])
+        assert result is None
+
+    @pytest.mark.anyio
+    async def test_with_schema_returns_response_when_found(
+        self, db_session: AsyncSession
+    ):
+        """get_or_none with schema returns Response[schema] when found."""
+        from fastapi_toolsets.schemas import Response
+
+        created = await RoleCrud.create(db_session, RoleCreate(name="editor"))
+        result = await RoleCrud.get_or_none(
+            db_session, [Role.id == created.id], schema=RoleRead
+        )
+
+        assert isinstance(result, Response)
+        assert isinstance(result.data, RoleRead)
+        assert result.data.name == "editor"
+
+    @pytest.mark.anyio
+    async def test_with_schema_returns_none_when_not_found(
+        self, db_session: AsyncSession
+    ):
+        """get_or_none with schema returns None (not Response) when not found."""
+        result = await RoleCrud.get_or_none(
+            db_session, [Role.id == uuid.uuid4()], schema=RoleRead
+        )
+        assert result is None
+
+    @pytest.mark.anyio
+    async def test_with_load_options(self, db_session: AsyncSession):
+        """get_or_none respects load_options."""
+        from sqlalchemy.orm import selectinload
+
+        role = await RoleCrud.create(db_session, RoleCreate(name="member"))
+        user = await UserCrud.create(
+            db_session,
+            UserCreate(username="alice", email="alice@test.com", role_id=role.id),
+        )
+
+        fetched = await UserCrud.get_or_none(
+            db_session,
+            [User.id == user.id],
+            load_options=[selectinload(User.role)],
+        )
+
+        assert fetched is not None
+        assert fetched.role is not None
+        assert fetched.role.name == "member"
+
+    @pytest.mark.anyio
+    async def test_with_join(self, db_session: AsyncSession):
+        """get_or_none respects joins."""
+        user = await UserCrud.create(
+            db_session, UserCreate(username="author", email="author@test.com")
+        )
+        await PostCrud.create(
+            db_session,
+            PostCreate(title="Published", author_id=user.id, is_published=True),
+        )
+
+        fetched = await UserCrud.get_or_none(
+            db_session,
+            [User.id == user.id, Post.is_published == True],  # noqa: E712
+            joins=[(Post, Post.author_id == User.id)],
+        )
+        assert fetched is not None
+        assert fetched.id == user.id
+
+        # Filter that matches no join — returns None
+        missing = await UserCrud.get_or_none(
+            db_session,
+            [User.id == user.id, Post.is_published == False],  # noqa: E712
+            joins=[(Post, Post.author_id == User.id)],
+        )
+        assert missing is None
+
+
 class TestCrudFirst:
     """Tests for CRUD first operations."""
 
@@ -321,6 +511,38 @@ class TestCrudFirst:
         role = await RoleCrud.first(db_session)
         assert role is not None
 
+    @pytest.mark.anyio
+    async def test_first_with_schema(self, db_session: AsyncSession):
+        """First with schema returns a Response wrapping the serialized record."""
+        await RoleCrud.create(db_session, RoleCreate(name="admin"))
+
+        result = await RoleCrud.first(
+            db_session, [Role.name == "admin"], schema=RoleRead
+        )
+
+        assert result is not None
+        assert result.data is not None
+        assert result.data.name == "admin"
+
+    @pytest.mark.anyio
+    async def test_first_with_schema_not_found(self, db_session: AsyncSession):
+        """First with schema returns None when no record matches."""
+        result = await RoleCrud.first(
+            db_session, [Role.name == "ghost"], schema=RoleRead
+        )
+        assert result is None
+
+    @pytest.mark.anyio
+    async def test_first_with_for_update(self, db_session: AsyncSession):
+        """First with with_for_update locks the row."""
+        await RoleCrud.create(db_session, RoleCreate(name="admin"))
+
+        role = await RoleCrud.first(
+            db_session, [Role.name == "admin"], with_for_update=True
+        )
+        assert role is not None
+        assert role.name == "admin"
+
 
 class TestCrudGetMulti:
     """Tests for CRUD get_multi operations."""
@@ -480,6 +702,69 @@ class TestCrudDelete:
         assert result.data is None
         assert await RoleCrud.first(db_session, [Role.id == role.id]) is None
 
+    @pytest.mark.anyio
+    async def test_delete_m2m_cascade(self, db_session: AsyncSession):
+        """Deleting a record with M2M relationships cleans up the association table."""
+        from sqlalchemy import text
+
+        user = await UserCrud.create(
+            db_session, UserCreate(username="author", email="author@test.com")
+        )
+        tag1 = await TagCrud.create(db_session, TagCreate(name="python"))
+        tag2 = await TagCrud.create(db_session, TagCreate(name="fastapi"))
+
+        post = await PostM2MCrud.create(
+            db_session,
+            PostM2MCreate(
+                title="M2M Delete Test",
+                author_id=user.id,
+                tag_ids=[tag1.id, tag2.id],
+            ),
+        )
+
+        await PostM2MCrud.delete(db_session, [Post.id == post.id])
+
+        # Post is gone
+        assert await PostCrud.first(db_session, [Post.id == post.id]) is None
+
+        # Association rows are gone — tags themselves must still exist
+        assert await TagCrud.first(db_session, [Tag.id == tag1.id]) is not None
+        assert await TagCrud.first(db_session, [Tag.id == tag2.id]) is not None
+
+        # No orphaned rows in post_tags
+        result = await db_session.execute(
+            text("SELECT COUNT(*) FROM post_tags WHERE post_id = :pid").bindparams(
+                pid=post.id
+            )
+        )
+        assert result.scalar() == 0
+
+    @pytest.mark.anyio
+    async def test_delete_m2m_does_not_delete_related_records(
+        self, db_session: AsyncSession
+    ):
+        """Deleting a post with M2M tags must not delete the tags themselves."""
+        user = await UserCrud.create(
+            db_session, UserCreate(username="author2", email="author2@test.com")
+        )
+        tag = await TagCrud.create(db_session, TagCreate(name="shared_tag"))
+
+        post1 = await PostM2MCrud.create(
+            db_session,
+            PostM2MCreate(title="Post 1", author_id=user.id, tag_ids=[tag.id]),
+        )
+        post2 = await PostM2MCrud.create(
+            db_session,
+            PostM2MCreate(title="Post 2", author_id=user.id, tag_ids=[tag.id]),
+        )
+
+        # Delete only post1
+        await PostM2MCrud.delete(db_session, [Post.id == post1.id])
+
+        # Tag and post2 still exist
+        assert await TagCrud.first(db_session, [Tag.id == tag.id]) is not None
+        assert await PostCrud.first(db_session, [Post.id == post2.id]) is not None
+
 
 class TestCrudExists:
     """Tests for CRUD exists operations."""
@@ -1684,11 +1969,8 @@ class TestCursorPaginatePrevCursor:
         assert page2.pagination.prev_cursor is not None
 
     @pytest.mark.anyio
-    async def test_prev_cursor_points_to_first_item(self, db_session: AsyncSession):
+    async def test_prev_cursor_navigates_back(self, db_session: AsyncSession):
-        """prev_cursor encodes the value of the first item on the current page."""
+        """prev_cursor on page 2 navigates back to the same items as page 1."""
-        import base64
-        import json
-
         for i in range(10):
             await RoleCrud.create(db_session, RoleCreate(name=f"role{i:02d}"))
 
@@ -1707,12 +1989,83 @@ class TestCursorPaginatePrevCursor:
         assert isinstance(page2.pagination, CursorPagination)
         assert page2.pagination.prev_cursor is not None
 
-        # Decode prev_cursor and compare to first item's id
+        # Using prev_cursor should return the same items as page 1
-        decoded = json.loads(
+        back_to_page1 = await RoleCursorCrud.cursor_paginate(
-            base64.b64decode(page2.pagination.prev_cursor.encode()).decode()
+            db_session,
+            cursor=page2.pagination.prev_cursor,
+            items_per_page=5,
+            schema=RoleRead,
         )
-        first_item_id = str(page2.data[0].id)
+        assert isinstance(back_to_page1.pagination, CursorPagination)
-        assert decoded == first_item_id
+        assert [r.id for r in back_to_page1.data] == [r.id for r in page1.data]
+        assert back_to_page1.pagination.prev_cursor is None
+
+    @pytest.mark.anyio
+    async def test_prev_cursor_empty_result_when_no_items_before(
+        self, db_session: AsyncSession
+    ):
+        """Going backward past the first item returns an empty page."""
+        from fastapi_toolsets.crud.factory import _encode_cursor
+        from fastapi_toolsets.schemas import CursorPagination
+
+        await IntRoleCursorCrud.create(db_session, IntRoleCreate(name="role00"))
+
+        page1 = await IntRoleCursorCrud.cursor_paginate(
+            db_session, items_per_page=5, schema=IntRoleRead
+        )
+        assert isinstance(page1.pagination, CursorPagination)
+
+        # Manually craft a backward cursor before any existing id
+        before_all = _encode_cursor(0, direction=_CursorDirection.PREV)
+        empty = await IntRoleCursorCrud.cursor_paginate(
+            db_session, cursor=before_all, items_per_page=5, schema=IntRoleRead
+        )
+
+        assert isinstance(empty.pagination, CursorPagination)
+        assert empty.data == []
+        assert empty.pagination.next_cursor is None
+        assert empty.pagination.prev_cursor is None
+
+    @pytest.mark.anyio
+    async def test_prev_cursor_set_when_more_pages_behind(
+        self, db_session: AsyncSession
+    ):
+        """Going backward on page 2 (of 3) still exposes a prev_cursor for page 1."""
+        for i in range(9):
+            await RoleCrud.create(db_session, RoleCreate(name=f"role{i:02d}"))
+
+        from fastapi_toolsets.schemas import CursorPagination
+
+        page1 = await RoleCursorCrud.cursor_paginate(
+            db_session, items_per_page=3, schema=RoleRead
+        )
+        assert isinstance(page1.pagination, CursorPagination)
+        page2 = await RoleCursorCrud.cursor_paginate(
+            db_session,
+            cursor=page1.pagination.next_cursor,
+            items_per_page=3,
+            schema=RoleRead,
+        )
+        assert isinstance(page2.pagination, CursorPagination)
+        page3 = await RoleCursorCrud.cursor_paginate(
+            db_session,
+            cursor=page2.pagination.next_cursor,
+            items_per_page=3,
+            schema=RoleRead,
+        )
+        assert isinstance(page3.pagination, CursorPagination)
+        assert page3.pagination.prev_cursor is not None
+
+        # Going back to page 2 should still have a prev_cursor pointing at page 1
+        back_to_page2 = await RoleCursorCrud.cursor_paginate(
+            db_session,
+            cursor=page3.pagination.prev_cursor,
+            items_per_page=3,
+            schema=RoleRead,
+        )
+        assert isinstance(back_to_page2.pagination, CursorPagination)
+        assert [r.id for r in back_to_page2.data] == [r.id for r in page2.data]
+        assert back_to_page2.pagination.prev_cursor is not None
 
 
 class TestCursorPaginateWithSearch:
@@ -2099,3 +2452,72 @@ class TestCursorPaginateColumnTypes:
         page1_ids = {p.id for p in page1.data}
         page2_ids = {p.id for p in page2.data}
         assert page1_ids.isdisjoint(page2_ids)
+
+
+class TestPaginate:
+    """Tests for the unified paginate() method."""
+
+    @pytest.mark.anyio
+    async def test_offset_pagination(self, db_session: AsyncSession):
+        """paginate() with OFFSET returns OffsetPaginatedResponse."""
+        from fastapi_toolsets.schemas import OffsetPagination
+
+        await RoleCrud.create(db_session, RoleCreate(name="admin"))
+        await RoleCrud.create(db_session, RoleCreate(name="user"))
+
+        result = await RoleCrud.paginate(
+            db_session,
+            pagination_type=PaginationType.OFFSET,
+            schema=RoleRead,
+        )
+
+        assert isinstance(result.pagination, OffsetPagination)
+        assert result.pagination_type == PaginationType.OFFSET
+
+    @pytest.mark.anyio
+    async def test_cursor_pagination(self, db_session: AsyncSession):
+        """paginate() with CURSOR returns CursorPaginatedResponse."""
+        from fastapi_toolsets.schemas import CursorPagination
+
+        await RoleCursorCrud.create(db_session, RoleCreate(name="admin"))
+
+        result = await RoleCursorCrud.paginate(
+            db_session,
+            pagination_type=PaginationType.CURSOR,
+            schema=RoleRead,
+        )
+
+        assert isinstance(result.pagination, CursorPagination)
+        assert result.pagination_type == PaginationType.CURSOR
+
+    @pytest.mark.anyio
+    async def test_invalid_items_per_page_raises(self, db_session: AsyncSession):
+        """paginate() raises ValueError when items_per_page < 1."""
+        with pytest.raises(ValueError, match="items_per_page"):
+            await RoleCrud.paginate(
+                db_session,
+                pagination_type=PaginationType.OFFSET,
+                items_per_page=0,
+                schema=RoleRead,
+            )
+
+    @pytest.mark.anyio
+    async def test_invalid_page_raises(self, db_session: AsyncSession):
+        """paginate() raises ValueError when page < 1 for offset pagination."""
+        with pytest.raises(ValueError, match="page"):
+            await RoleCrud.paginate(
+                db_session,
+                pagination_type=PaginationType.OFFSET,
+                page=0,
+                schema=RoleRead,
+            )
+
+    @pytest.mark.anyio
+    async def test_unknown_pagination_type_raises(self, db_session: AsyncSession):
+        """paginate() raises ValueError for unknown pagination_type."""
+        with pytest.raises(ValueError, match="Unknown pagination_type"):
+            await RoleCrud.paginate(
+                db_session,
+                pagination_type="unknown",
+                schema=RoleRead,
+            )  # type: ignore[no-matching-overload]

tests/test_crud_search.py

@@ -211,14 +211,17 @@ class TestPaginateSearch:
         assert result.data[0].username == "active_john"
 
     @pytest.mark.anyio
-    async def test_search_auto_detect_fields(self, db_session: AsyncSession):
+    async def test_search_explicit_fields(self, db_session: AsyncSession):
-        """Auto-detect searchable fields when not specified."""
+        """Search works when search_fields are passed per call."""
         await UserCrud.create(
             db_session, UserCreate(username="findme", email="other@test.com")
         )
 
         result = await UserCrud.offset_paginate(
-            db_session, search="findme", schema=UserRead
+            db_session,
+            search="findme",
+            search_fields=[User.username],
+            schema=UserRead,
         )
 
         assert isinstance(result.pagination, OffsetPagination)

tests/test_dependencies.py

@@ -3,13 +3,17 @@
 import inspect
 import uuid
 from collections.abc import AsyncGenerator
-from typing import Any, cast
+from typing import Annotated, Any, cast
 
 import pytest
 from fastapi.params import Depends
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from fastapi_toolsets.dependencies import BodyDependency, PathDependency
+from fastapi_toolsets.dependencies import (
+    BodyDependency,
+    PathDependency,
+    _unwrap_session_dep,
+)
 
 from .conftest import Role, RoleCreate, RoleCrud, User
 
@@ -19,6 +23,24 @@ async def mock_get_db() -> AsyncGenerator[AsyncSession, None]:
     yield None
 
 
+MockSessionDep = Annotated[AsyncSession, Depends(mock_get_db)]
+
+
+class TestUnwrapSessionDep:
+    def test_plain_callable_returned_as_is(self):
+        """Plain callable is returned unchanged."""
+        assert _unwrap_session_dep(mock_get_db) is mock_get_db
+
+    def test_annotated_with_depends_unwrapped(self):
+        """Annotated form with Depends is unwrapped to the plain callable."""
+        assert _unwrap_session_dep(MockSessionDep) is mock_get_db
+
+    def test_annotated_without_depends_returned_as_is(self):
+        """Annotated form with no Depends falls back to returning session_dep as-is."""
+        annotated_no_dep = Annotated[AsyncSession, "not_a_depends"]
+        assert _unwrap_session_dep(annotated_no_dep) is annotated_no_dep
+
+
 class TestPathDependency:
     """Tests for PathDependency factory."""
 
@@ -95,6 +117,39 @@ class TestPathDependency:
         assert result.id == role.id
         assert result.name == "test_role"
 
+    def test_annotated_session_dep_returns_depends_instance(self):
+        """PathDependency accepts Annotated[AsyncSession, Depends(...)] form."""
+        dep = PathDependency(Role, Role.id, session_dep=MockSessionDep)
+        assert isinstance(dep, Depends)
+
+    def test_annotated_session_dep_signature(self):
+        """PathDependency with Annotated session_dep produces a valid signature."""
+        dep = cast(Any, PathDependency(Role, Role.id, session_dep=MockSessionDep))
+        sig = inspect.signature(dep.dependency)
+
+        assert "role_id" in sig.parameters
+        assert "session" in sig.parameters
+        assert isinstance(sig.parameters["session"].default, Depends)
+
+    def test_annotated_session_dep_unwraps_callable(self):
+        """PathDependency with Annotated form uses the underlying callable, not the Annotated type."""
+        dep = cast(Any, PathDependency(Role, Role.id, session_dep=MockSessionDep))
+        sig = inspect.signature(dep.dependency)
+
+        inner_dep = sig.parameters["session"].default
+        assert inner_dep.dependency is mock_get_db
+
+    @pytest.mark.anyio
+    async def test_annotated_session_dep_fetches_object(self, db_session):
+        """PathDependency with Annotated session_dep correctly fetches object from database."""
+        role = await RoleCrud.create(db_session, RoleCreate(name="annotated_role"))
+
+        dep = cast(Any, PathDependency(Role, Role.id, session_dep=MockSessionDep))
+        result = await dep.dependency(session=db_session, role_id=role.id)
+
+        assert result.id == role.id
+        assert result.name == "annotated_role"
+
 
 class TestBodyDependency:
     """Tests for BodyDependency factory."""
@@ -184,3 +239,39 @@ class TestBodyDependency:
 
         assert result.id == role.id
         assert result.name == "body_test_role"
+
+    def test_annotated_session_dep_returns_depends_instance(self):
+        """BodyDependency accepts Annotated[AsyncSession, Depends(...)] form."""
+        dep = BodyDependency(
+            Role, Role.id, session_dep=MockSessionDep, body_field="role_id"
+        )
+        assert isinstance(dep, Depends)
+
+    def test_annotated_session_dep_unwraps_callable(self):
+        """BodyDependency with Annotated form uses the underlying callable, not the Annotated type."""
+        dep = cast(
+            Any,
+            BodyDependency(
+                Role, Role.id, session_dep=MockSessionDep, body_field="role_id"
+            ),
+        )
+        sig = inspect.signature(dep.dependency)
+
+        inner_dep = sig.parameters["session"].default
+        assert inner_dep.dependency is mock_get_db
+
+    @pytest.mark.anyio
+    async def test_annotated_session_dep_fetches_object(self, db_session):
+        """BodyDependency with Annotated session_dep correctly fetches object from database."""
+        role = await RoleCrud.create(db_session, RoleCreate(name="body_annotated_role"))
+
+        dep = cast(
+            Any,
+            BodyDependency(
+                Role, Role.id, session_dep=MockSessionDep, body_field="role_id"
+            ),
+        )
+        result = await dep.dependency(session=db_session, role_id=role.id)
+
+        assert result.id == role.id
+        assert result.name == "body_annotated_role"

tests/test_example_pagination_search.py

@@ -393,3 +393,105 @@ class TestCursorSorting:
         body = resp.json()
         assert body["error_code"] == "SORT-422"
         assert body["status"] == "FAIL"
+
+
+class TestPaginateUnified:
+    """Tests for the unified GET /articles/ endpoint using paginate()."""
+
+    @pytest.mark.anyio
+    async def test_defaults_to_offset_pagination(
+        self, client: AsyncClient, ex_db_session
+    ):
+        """Without pagination_type, defaults to offset pagination."""
+        await seed(ex_db_session)
+
+        resp = await client.get("/articles/")
+
+        assert resp.status_code == 200
+        body = resp.json()
+        assert body["pagination_type"] == "offset"
+        assert "total_count" in body["pagination"]
+        assert body["pagination"]["total_count"] == 3
+
+    @pytest.mark.anyio
+    async def test_explicit_offset_pagination(self, client: AsyncClient, ex_db_session):
+        """pagination_type=offset returns OffsetPagination metadata."""
+        await seed(ex_db_session)
+
+        resp = await client.get(
+            "/articles/?pagination_type=offset&page=1&items_per_page=2"
+        )
+
+        assert resp.status_code == 200
+        body = resp.json()
+        assert body["pagination_type"] == "offset"
+        assert body["pagination"]["total_count"] == 3
+        assert body["pagination"]["page"] == 1
+        assert body["pagination"]["has_more"] is True
+        assert len(body["data"]) == 2
+
+    @pytest.mark.anyio
+    async def test_cursor_pagination_type(self, client: AsyncClient, ex_db_session):
+        """pagination_type=cursor returns CursorPagination metadata."""
+        await seed(ex_db_session)
+
+        resp = await client.get("/articles/?pagination_type=cursor&items_per_page=2")
+
+        assert resp.status_code == 200
+        body = resp.json()
+        assert body["pagination_type"] == "cursor"
+        assert "next_cursor" in body["pagination"]
+        assert "total_count" not in body["pagination"]
+        assert body["pagination"]["has_more"] is True
+        assert len(body["data"]) == 2
+
+    @pytest.mark.anyio
+    async def test_cursor_pagination_navigate_pages(
+        self, client: AsyncClient, ex_db_session
+    ):
+        """Cursor from first page can be used to fetch the next page."""
+        await seed(ex_db_session)
+
+        first = await client.get("/articles/?pagination_type=cursor&items_per_page=2")
+        assert first.status_code == 200
+        first_body = first.json()
+        next_cursor = first_body["pagination"]["next_cursor"]
+        assert next_cursor is not None
+
+        second = await client.get(
+            f"/articles/?pagination_type=cursor&items_per_page=2&cursor={next_cursor}"
+        )
+        assert second.status_code == 200
+        second_body = second.json()
+        assert second_body["pagination_type"] == "cursor"
+        assert second_body["pagination"]["has_more"] is False
+        assert len(second_body["data"]) == 1
+
+    @pytest.mark.anyio
+    async def test_cursor_pagination_with_search(
+        self, client: AsyncClient, ex_db_session
+    ):
+        """paginate() with cursor type respects search parameter."""
+        await seed(ex_db_session)
+
+        resp = await client.get("/articles/?pagination_type=cursor&search=fastapi")
+
+        assert resp.status_code == 200
+        body = resp.json()
+        assert body["pagination_type"] == "cursor"
+        assert len(body["data"]) == 1
+        assert body["data"][0]["title"] == "FastAPI tips"
+
+    @pytest.mark.anyio
+    async def test_offset_pagination_with_filter(
+        self, client: AsyncClient, ex_db_session
+    ):
+        """paginate() with offset type respects filter_by parameter."""
+        await seed(ex_db_session)
+
+        resp = await client.get("/articles/?pagination_type=offset&status=published")
+
+        assert resp.status_code == 200
+        body = resp.json()
+        assert body["pagination_type"] == "offset"
+        assert body["pagination"]["total_count"] == 2

tests/test_models.py

@@ -11,6 +11,7 @@ from fastapi_toolsets.models import (
     CreatedAtMixin,
     TimestampMixin,
     UUIDMixin,
+    UUIDv7Mixin,
     UpdatedAtMixin,
 )
 
@@ -48,6 +49,12 @@ class TimestampModel(MixinBase, TimestampMixin):
     name: Mapped[str] = mapped_column(String(50))
 
 
+class UUIDv7Model(MixinBase, UUIDv7Mixin):
+    __tablename__ = "mixin_uuidv7_models"
+
+    name: Mapped[str] = mapped_column(String(50))
+
+
 class FullMixinModel(MixinBase, UUIDMixin, UpdatedAtMixin):
     __tablename__ = "mixin_full_models"
 
@@ -233,6 +240,50 @@ class TestTimestampMixin:
         assert "updated_at" in col_names
 
 
+class TestUUIDv7Mixin:
+    @pytest.mark.anyio
+    async def test_uuid7_generated_by_db(self, mixin_session):
+        """UUIDv7 is generated server-side and populated after flush."""
+        obj = UUIDv7Model(name="test")
+        mixin_session.add(obj)
+        await mixin_session.flush()
+
+        assert obj.id is not None
+        assert isinstance(obj.id, uuid.UUID)
+
+    @pytest.mark.anyio
+    async def test_uuid7_is_primary_key(self):
+        """UUIDv7Mixin adds id as primary key column."""
+        pk_cols = [c.name for c in UUIDv7Model.__table__.primary_key]
+        assert pk_cols == ["id"]
+
+    @pytest.mark.anyio
+    async def test_each_row_gets_unique_uuid7(self, mixin_session):
+        """Each inserted row gets a distinct UUIDv7."""
+        a = UUIDv7Model(name="a")
+        b = UUIDv7Model(name="b")
+        mixin_session.add_all([a, b])
+        await mixin_session.flush()
+
+        assert a.id != b.id
+
+    @pytest.mark.anyio
+    async def test_uuid7_version(self, mixin_session):
+        """Generated UUIDs have version 7."""
+        obj = UUIDv7Model(name="test")
+        mixin_session.add(obj)
+        await mixin_session.flush()
+
+        assert obj.id.version == 7
+
+    @pytest.mark.anyio
+    async def test_uuid7_server_default_set(self):
+        """Column has uuidv7() as server default."""
+        col = UUIDv7Model.__table__.c["id"]
+        assert col.server_default is not None
+        assert "uuidv7" in str(col.server_default.arg)
+
+
 class TestFullMixinModel:
     @pytest.mark.anyio
     async def test_combined_mixins_work_together(self, mixin_session):

tests/test_schemas.py

@@ -6,9 +6,12 @@ from pydantic import ValidationError
 from fastapi_toolsets.schemas import (
     ApiError,
     CursorPagination,
+    CursorPaginatedResponse,
     ErrorResponse,
     OffsetPagination,
+    OffsetPaginatedResponse,
     PaginatedResponse,
+    PaginationType,
     Response,
     ResponseStatus,
 )
@@ -301,7 +304,7 @@ class TestPaginatedResponse:
             page=1,
             has_more=False,
         )
-        response = PaginatedResponse[dict](
+        response = PaginatedResponse(
             data=[],
             pagination=pagination,
         )
@@ -310,13 +313,32 @@ class TestPaginatedResponse:
         assert response.data == []
         assert response.pagination.total_count == 0
 
+    def test_class_getitem_with_concrete_type_returns_discriminated_union(self):
+        """PaginatedResponse[T] with a concrete type returns a discriminated Annotated union."""
+        import typing
+
+        alias = PaginatedResponse[dict]
+        args = typing.get_args(alias)
+        # args[0] is the Union, args[1] is the FieldInfo discriminator
+        union_args = typing.get_args(args[0])
+        assert CursorPaginatedResponse[dict] in union_args
+        assert OffsetPaginatedResponse[dict] in union_args
+
+    def test_class_getitem_is_cached(self):
+        """Repeated subscripting with the same type returns the identical cached object."""
+        assert PaginatedResponse[dict] is PaginatedResponse[dict]
+
+    def test_class_getitem_with_typevar_returns_generic(self):
+        """PaginatedResponse[TypeVar] falls through to Pydantic generic parametrisation."""
+        from typing import TypeVar
+
+        T = TypeVar("T")
+        alias = PaginatedResponse[T]
+        # Should be a generic alias, not an Annotated union
+        assert not hasattr(alias, "__metadata__")
+
     def test_generic_type_hint(self):
         """PaginatedResponse supports generic type hints."""
-
-        class UserOut:
-            id: int
-            name: str
-
         pagination = OffsetPagination(
             total_count=1,
             items_per_page=10,
@@ -371,6 +393,191 @@ class TestPaginatedResponse:
         assert isinstance(response.pagination, CursorPagination)
 
 
+class TestPaginationType:
+    """Tests for PaginationType enum."""
+
+    def test_offset_value(self):
+        """OFFSET has string value 'offset'."""
+        assert PaginationType.OFFSET == "offset"
+        assert PaginationType.OFFSET.value == "offset"
+
+    def test_cursor_value(self):
+        """CURSOR has string value 'cursor'."""
+        assert PaginationType.CURSOR == "cursor"
+        assert PaginationType.CURSOR.value == "cursor"
+
+    def test_is_string_enum(self):
+        """PaginationType is a string enum."""
+        assert isinstance(PaginationType.OFFSET, str)
+        assert isinstance(PaginationType.CURSOR, str)
+
+    def test_members(self):
+        """PaginationType has exactly two members."""
+        assert set(PaginationType) == {PaginationType.OFFSET, PaginationType.CURSOR}
+
+
+class TestOffsetPaginatedResponse:
+    """Tests for OffsetPaginatedResponse schema."""
+
+    def test_pagination_type_is_offset(self):
+        """pagination_type is always PaginationType.OFFSET."""
+        response = OffsetPaginatedResponse(
+            data=[],
+            pagination=OffsetPagination(
+                total_count=0, items_per_page=10, page=1, has_more=False
+            ),
+        )
+        assert response.pagination_type is PaginationType.OFFSET
+
+    def test_pagination_type_serializes_to_string(self):
+        """pagination_type serializes to 'offset' in JSON mode."""
+        response = OffsetPaginatedResponse(
+            data=[],
+            pagination=OffsetPagination(
+                total_count=0, items_per_page=10, page=1, has_more=False
+            ),
+        )
+        assert response.model_dump(mode="json")["pagination_type"] == "offset"
+
+    def test_pagination_field_is_typed(self):
+        """pagination field is OffsetPagination, not the union."""
+        response = OffsetPaginatedResponse(
+            data=[{"id": 1}],
+            pagination=OffsetPagination(
+                total_count=10, items_per_page=5, page=2, has_more=True
+            ),
+        )
+        assert isinstance(response.pagination, OffsetPagination)
+        assert response.pagination.total_count == 10
+        assert response.pagination.page == 2
+
+    def test_is_subclass_of_paginated_response(self):
+        """OffsetPaginatedResponse IS a PaginatedResponse."""
+        response = OffsetPaginatedResponse(
+            data=[],
+            pagination=OffsetPagination(
+                total_count=0, items_per_page=10, page=1, has_more=False
+            ),
+        )
+        assert isinstance(response, PaginatedResponse)
+
+    def test_pagination_type_default_cannot_be_overridden_to_cursor(self):
+        """pagination_type rejects values other than OFFSET."""
+        with pytest.raises(ValidationError):
+            OffsetPaginatedResponse(
+                data=[],
+                pagination=OffsetPagination(
+                    total_count=0, items_per_page=10, page=1, has_more=False
+                ),
+                pagination_type=PaginationType.CURSOR,  # type: ignore[arg-type]
+            )
+
+    def test_filter_attributes_defaults_to_none(self):
+        """filter_attributes defaults to None."""
+        response = OffsetPaginatedResponse(
+            data=[],
+            pagination=OffsetPagination(
+                total_count=0, items_per_page=10, page=1, has_more=False
+            ),
+        )
+        assert response.filter_attributes is None
+
+    def test_full_serialization(self):
+        """Full JSON serialization includes all expected fields."""
+        response = OffsetPaginatedResponse(
+            data=[{"id": 1}],
+            pagination=OffsetPagination(
+                total_count=1, items_per_page=10, page=1, has_more=False
+            ),
+            filter_attributes={"status": ["active"]},
+        )
+        data = response.model_dump(mode="json")
+
+        assert data["pagination_type"] == "offset"
+        assert data["status"] == "SUCCESS"
+        assert data["data"] == [{"id": 1}]
+        assert data["pagination"]["total_count"] == 1
+        assert data["filter_attributes"] == {"status": ["active"]}
+
+
+class TestCursorPaginatedResponse:
+    """Tests for CursorPaginatedResponse schema."""
+
+    def test_pagination_type_is_cursor(self):
+        """pagination_type is always PaginationType.CURSOR."""
+        response = CursorPaginatedResponse(
+            data=[],
+            pagination=CursorPagination(
+                next_cursor=None, items_per_page=10, has_more=False
+            ),
+        )
+        assert response.pagination_type is PaginationType.CURSOR
+
+    def test_pagination_type_serializes_to_string(self):
+        """pagination_type serializes to 'cursor' in JSON mode."""
+        response = CursorPaginatedResponse(
+            data=[],
+            pagination=CursorPagination(
+                next_cursor=None, items_per_page=10, has_more=False
+            ),
+        )
+        assert response.model_dump(mode="json")["pagination_type"] == "cursor"
+
+    def test_pagination_field_is_typed(self):
+        """pagination field is CursorPagination, not the union."""
+        response = CursorPaginatedResponse(
+            data=[{"id": 1}],
+            pagination=CursorPagination(
+                next_cursor="abc123",
+                prev_cursor=None,
+                items_per_page=20,
+                has_more=True,
+            ),
+        )
+        assert isinstance(response.pagination, CursorPagination)
+        assert response.pagination.next_cursor == "abc123"
+        assert response.pagination.has_more is True
+
+    def test_is_subclass_of_paginated_response(self):
+        """CursorPaginatedResponse IS a PaginatedResponse."""
+        response = CursorPaginatedResponse(
+            data=[],
+            pagination=CursorPagination(
+                next_cursor=None, items_per_page=10, has_more=False
+            ),
+        )
+        assert isinstance(response, PaginatedResponse)
+
+    def test_pagination_type_default_cannot_be_overridden_to_offset(self):
+        """pagination_type rejects values other than CURSOR."""
+        with pytest.raises(ValidationError):
+            CursorPaginatedResponse(
+                data=[],
+                pagination=CursorPagination(
+                    next_cursor=None, items_per_page=10, has_more=False
+                ),
+                pagination_type=PaginationType.OFFSET,  # type: ignore[arg-type]
+            )
+
+    def test_full_serialization(self):
+        """Full JSON serialization includes all expected fields."""
+        response = CursorPaginatedResponse(
+            data=[{"id": 1}],
+            pagination=CursorPagination(
+                next_cursor="tok_next",
+                prev_cursor="tok_prev",
+                items_per_page=10,
+                has_more=True,
+            ),
+        )
+        data = response.model_dump(mode="json")
+
+        assert data["pagination_type"] == "cursor"
+        assert data["status"] == "SUCCESS"
+        assert data["pagination"]["next_cursor"] == "tok_next"
+        assert data["pagination"]["prev_cursor"] == "tok_prev"
+
+
 class TestFromAttributes:
     """Tests for from_attributes config (ORM mode)."""
 

uv.lock

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 ]
 
+[[package]]
+name = "bcrypt"
+version = "5.0.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/d4/36/3329e2518d70ad8e2e5817d5a4cac6bba05a47767ec416c7d020a965f408/bcrypt-5.0.0.tar.gz", hash = "sha256:f748f7c2d6fd375cc93d3fba7ef4a9e3a092421b8dbf34d8d4dc06be9492dfdd", size = 25386, upload-time = "2025-09-25T19:50:47.829Z" }
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 version = "2026.1.4"
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 [[package]]
 name = "fastapi-toolsets"
-version = "2.1.0"
+version = "2.3.0"
 source = { editable = "." }
 dependencies = [
     { name = "asyncpg" },
@@ -282,6 +352,7 @@ pytest = [
 
 [package.dev-dependencies]
 dev = [
+    { name = "bcrypt" },
     { name = "coverage" },
     { name = "fastapi-toolsets", extra = ["all"] },
     { name = "httpx" },
@@ -298,6 +369,9 @@ docs = [
     { name = "mkdocstrings-python" },
     { name = "zensical" },
 ]
+docs-src = [
+    { name = "bcrypt" },
+]
 tests = [
     { name = "coverage" },
     { name = "httpx" },
@@ -324,6 +398,7 @@ provides-extras = ["cli", "metrics", "pytest", "all"]
 
 [package.metadata.requires-dev]
 dev = [
+    { name = "bcrypt", specifier = ">=4.0.0" },
     { name = "coverage", specifier = ">=7.0.0" },
     { name = "fastapi-toolsets", extras = ["all"] },
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     { name = "zensical", specifier = ">=0.0.23" },
 ]
+docs-src = [{ name = "bcrypt", specifier = ">=4.0.0" }]
 tests = [
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     { name = "httpx", specifier = ">=0.25.0" },
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