mirror of
https://github.com/d3vyce/fastapi-toolsets.git
synced 2026-04-16 14:46:24 +02:00
432e0722e0
* refactor: remove deprecated parameter and function * refactor: centralize type aliases in types.py and simplify crud layer * test: add missing tests for fixtures/utils.py * refactor: simplify and deduplicate across crud, metrics, cli, and exceptions * docs: fix old Paginate references * docs: add migration + fix icon * docs: update README/migration to v2
143 lines
3.9 KiB
Python
143 lines
3.9 KiB
Python
"""Dependency factories for FastAPI routes."""
|
|
|
|
import inspect
|
|
from collections.abc import Callable
|
|
from typing import Any, cast
|
|
|
|
from fastapi import Depends
|
|
from sqlalchemy.ext.asyncio import AsyncSession
|
|
|
|
from .crud import CrudFactory
|
|
from .types import ModelType, SessionDependency
|
|
|
|
__all__ = ["BodyDependency", "PathDependency"]
|
|
|
|
|
|
def PathDependency(
|
|
model: type[ModelType],
|
|
field: Any,
|
|
*,
|
|
session_dep: SessionDependency,
|
|
param_name: str | None = None,
|
|
) -> ModelType:
|
|
"""Create a dependency that fetches a DB object from a path parameter.
|
|
|
|
Args:
|
|
model: SQLAlchemy model class
|
|
field: Model field to filter by (e.g., User.id)
|
|
session_dep: Session dependency function (e.g., get_db)
|
|
param_name: Path parameter name (defaults to model_field, e.g., user_id)
|
|
|
|
Returns:
|
|
A Depends() instance that resolves to the model instance
|
|
|
|
Raises:
|
|
NotFoundError: If no matching record is found
|
|
|
|
Example:
|
|
```python
|
|
UserDep = PathDependency(User, User.id, session_dep=get_db)
|
|
|
|
@router.get("/user/{id}")
|
|
async def get(
|
|
user: User = UserDep,
|
|
): ...
|
|
```
|
|
"""
|
|
crud = CrudFactory(model)
|
|
name = (
|
|
param_name
|
|
if param_name is not None
|
|
else "{}_{}".format(model.__name__.lower(), field.key)
|
|
)
|
|
python_type = field.type.python_type
|
|
|
|
async def dependency(
|
|
session: AsyncSession = Depends(session_dep), **kwargs: Any
|
|
) -> ModelType:
|
|
value = kwargs[name]
|
|
return await crud.get(session, filters=[field == value])
|
|
|
|
setattr(
|
|
dependency,
|
|
"__signature__",
|
|
inspect.Signature(
|
|
parameters=[
|
|
inspect.Parameter(
|
|
name, inspect.Parameter.KEYWORD_ONLY, annotation=python_type
|
|
),
|
|
inspect.Parameter(
|
|
"session",
|
|
inspect.Parameter.KEYWORD_ONLY,
|
|
annotation=AsyncSession,
|
|
default=Depends(session_dep),
|
|
),
|
|
]
|
|
),
|
|
)
|
|
|
|
return cast(ModelType, Depends(cast(Callable[..., ModelType], dependency)))
|
|
|
|
|
|
def BodyDependency(
|
|
model: type[ModelType],
|
|
field: Any,
|
|
*,
|
|
session_dep: SessionDependency,
|
|
body_field: str,
|
|
) -> ModelType:
|
|
"""Create a dependency that fetches a DB object from a body field.
|
|
|
|
Args:
|
|
model: SQLAlchemy model class
|
|
field: Model field to filter by (e.g., User.id)
|
|
session_dep: Session dependency function (e.g., get_db)
|
|
body_field: Name of the field in the request body
|
|
|
|
Returns:
|
|
A Depends() instance that resolves to the model instance
|
|
|
|
Raises:
|
|
NotFoundError: If no matching record is found
|
|
|
|
Example:
|
|
```python
|
|
UserDep = BodyDependency(
|
|
User, User.ctfd_id, session_dep=get_db, body_field="user_id"
|
|
)
|
|
|
|
@router.post("/assign")
|
|
async def assign(
|
|
user: User = UserDep,
|
|
): ...
|
|
```
|
|
"""
|
|
crud = CrudFactory(model)
|
|
python_type = field.type.python_type
|
|
|
|
async def dependency(
|
|
session: AsyncSession = Depends(session_dep), **kwargs: Any
|
|
) -> ModelType:
|
|
value = kwargs[body_field]
|
|
return await crud.get(session, filters=[field == value])
|
|
|
|
setattr(
|
|
dependency,
|
|
"__signature__",
|
|
inspect.Signature(
|
|
parameters=[
|
|
inspect.Parameter(
|
|
body_field, inspect.Parameter.KEYWORD_ONLY, annotation=python_type
|
|
),
|
|
inspect.Parameter(
|
|
"session",
|
|
inspect.Parameter.KEYWORD_ONLY,
|
|
annotation=AsyncSession,
|
|
default=Depends(session_dep),
|
|
),
|
|
]
|
|
),
|
|
)
|
|
|
|
return cast(ModelType, Depends(cast(Callable[..., ModelType], dependency)))
|