Injection to Annotated on FastAPI Router (python 3.11)

[Modif93]

I'm using Dependency injector on my FastAPI Project.

currently using FastAPI

while Injecting some packages on FastAPI + SQLAlchemy + DI Project, for example

@router.get("/users")
@inject
def get_users(
        user_service: UserService = Depends(Provide[Container.user_service])
) -> List[UserModel] :
    some..codes..

I inject dependencies with non-annotated style codes.

can I do it with annotated style, like for example

userService = Annotated[UserService, Depends(Provide[Container.user_service])]

@router.get("/users")
@inject
def get_users(user_service: userService) -> List[UserModel] :
    some..codes..

It doesn't works well, with following errors.

AttributeError: 'Provide' object has no attribute 'get_all'

Think it finds dependency from Provide.

is there any way to use annotated style like above?

[Modif93]

Ok, I'm answering my own question

@inject
def get_user_service(
        user_service: UserService = Depends(Provide[Container.user_service])
):
    return user_service

userService = Annotated[UserService, Depends(get_user_service)]

@router.get("/users")
def get_users(user_service: userService) -> List[UserModel] :
    some..codes..

working well with code above, and tried below,

@inject
def get_user_service(
        user_service: Annotated[UserService, Depends(Provide[Container.user_service])]
):
    return user_service

userService = Annotated[UserService, Depends(get_user_service)]

@router.get("/users")
def get_users(user_service: userService) -> List[UserModel] :
    some..codes..

same error. seems new wiring layer is needed for injection, between endpoint layer and service layer.

[maintain0404]

#721 Use this.