ASLabs Dependencies: FastAPI

FastAPI Adapter for the ASLabs Dependencies package.

How to use it:

In your main.py, add the Dependencies additional handler:

from fastapi import FastAPI

from aslabs.dependencies.fastapi import Dependencies


app = FastAPI()
deps = Dependencies(app)    # Add line

In your various routers, replace APIRouter with DependencyRouter and use it to register your dependencies:

from aslabs.dependencies.fastapi import DependencyRouter, D


router = DependencyRouter()
router.register_dependencies(lambda deps: deps.add_direct(MyDependencyClass))      # Register your dependencies here

Once registered, use the D parameter function to request dependencies. Notably, you must specify the type as the parameter for D (cannot be infered).

@router.get("/")
def index(dep: MyDependencyClass = D(MyDependencyClass)):
    return {"Hello": dep.get_world()}

Once setup, back in your main.py, register the router on deps, not on app. The same parameters can be used as app.include_router

deps.include_router(router)

You are now done.

Adding global dependencies

You can add dependencies directly to the deps object, by calling register_with:

deps.register_with(lambda deps: deps.add_direct(GlobalDependency))