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feat: add NOWAIT/SKIP LOCKED row locking support and extend with_for_update to get_multi and update (#281)

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d3vyce
2026-05-16 11:59:37 +02:00
committed by GitHub
parent f57c9e40b9
commit 2a427a2946
3 changed files with 271 additions and 15 deletions
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src/fastapi_toolsets/crud/factory.py
+37 -14
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@@ -10,7 +10,7 @@ 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 typing import Any, ClassVar, Generic, Literal, Self, TypeAlias, cast, overload
from fastapi import Query
from pydantic import BaseModel
@@ -52,6 +52,19 @@ from .search import (
)
_ForUpdateMode: TypeAlias = bool | Literal["nowait", "skip_locked"]
def _apply_for_update(q: Any, mode: _ForUpdateMode) -> Any:
if not mode:
return q
if mode == "nowait":
return q.with_for_update(nowait=True)
if mode == "skip_locked":
return q.with_for_update(skip_locked=True)
return q.with_for_update()
class _CursorDirection(str, Enum):
NEXT = "next"
PREV = "prev"
@@ -733,7 +746,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: type[SchemaType],
) -> Response[SchemaType]: ...
@@ -747,7 +760,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: None = ...,
) -> ModelType: ...
@@ -760,7 +773,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: type[BaseModel] | None = None,
) -> ModelType | Response[Any]:
@@ -805,7 +818,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: type[SchemaType],
) -> Response[SchemaType] | None: ...
@@ -819,7 +832,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: None = ...,
) -> ModelType | None: ...
@@ -832,7 +845,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: type[BaseModel] | None = None,
) -> ModelType | Response[Any] | None:
@@ -864,8 +877,7 @@ 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()
q = _apply_for_update(q, with_for_update)
result = await session.execute(q)
item = result.unique().scalar_one_or_none()
if item is None:
@@ -884,7 +896,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: type[SchemaType],
) -> Response[SchemaType] | None: ...
@@ -898,7 +910,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: None = ...,
) -> ModelType | None: ...
@@ -911,7 +923,7 @@ class AsyncCrud(Generic[ModelType]):
*,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
schema: type[BaseModel] | None = None,
) -> ModelType | Response[Any] | None:
@@ -937,8 +949,7 @@ 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()
q = _apply_for_update(q, with_for_update)
result = await session.execute(q)
item = result.unique().scalars().first()
if item is None:
@@ -956,6 +967,7 @@ class AsyncCrud(Generic[ModelType]):
filters: list[Any] | None = None,
joins: JoinType | None = None,
outer_join: bool = False,
with_for_update: _ForUpdateMode = False,
load_options: Sequence[ExecutableOption] | None = None,
order_by: OrderByClause | None = None,
limit: int | None = None,
@@ -968,6 +980,9 @@ 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
with_for_update: Lock rows for update. ``True`` for plain ``FOR UPDATE``,
``"nowait"`` for ``FOR UPDATE NOWAIT``, ``"skip_locked"`` for
``FOR UPDATE SKIP LOCKED``.
load_options: SQLAlchemy loader options
order_by: Column or list of columns to order by
limit: Max number of rows to return
@@ -982,6 +997,7 @@ class AsyncCrud(Generic[ModelType]):
q = q.where(and_(*filters))
if resolved := cls._resolve_load_options(load_options):
q = q.options(*resolved)
q = _apply_for_update(q, with_for_update)
if order_by is not None:
q = q.order_by(order_by)
if offset is not None:
@@ -1001,6 +1017,7 @@ class AsyncCrud(Generic[ModelType]):
*,
exclude_unset: bool = True,
exclude_none: bool = False,
with_for_update: _ForUpdateMode = False,
schema: type[SchemaType],
) -> Response[SchemaType]: ...
@@ -1014,6 +1031,7 @@ class AsyncCrud(Generic[ModelType]):
*,
exclude_unset: bool = True,
exclude_none: bool = False,
with_for_update: _ForUpdateMode = False,
schema: None = ...,
) -> ModelType: ...
@@ -1026,6 +1044,7 @@ class AsyncCrud(Generic[ModelType]):
*,
exclude_unset: bool = True,
exclude_none: bool = False,
with_for_update: _ForUpdateMode = False,
schema: type[BaseModel] | None = None,
) -> ModelType | Response[Any]:
"""Update a record in the database.
@@ -1036,6 +1055,9 @@ class AsyncCrud(Generic[ModelType]):
filters: List of SQLAlchemy filter conditions
exclude_unset: Exclude fields not explicitly set in the schema
exclude_none: Exclude fields with None value
with_for_update: Lock the row before updating. ``True`` for plain
``FOR UPDATE``, ``"nowait"`` for ``FOR UPDATE NOWAIT``,
``"skip_locked"`` for ``FOR UPDATE SKIP LOCKED``.
schema: Pydantic schema to serialize the result into. When provided,
the result is automatically wrapped in a ``Response[schema]``.
@@ -1059,6 +1081,7 @@ class AsyncCrud(Generic[ModelType]):
db_model = await cls.get(
session=session,
filters=filters,
with_for_update=with_for_update,
load_options=m2m_load_options or None,
)
values = obj.model_dump(