Inject in Routes

Use Injected[T] in FastAPI HTTP and WebSocket handlers.

HTTP Route Injection

from typing import Annotated
from fastapi import Header
from wireup import Inject, Injected


@app.get("/users")
async def users(
    # Inject services
    service: Injected[UserService],
    # Inject config values
    is_debug: Annotated[bool, Inject(config="debug")],
    # Regular FastAPI dependencies still work
    user_agent: Annotated[str | None, Header()] = None,
): ...

WebSocket Route Injection

from fastapi import WebSocket
from wireup import Injected


@app.websocket("/ws")
async def ws(
    websocket: WebSocket,
    greeter: Injected[GreeterService],
): ...

For injecting fastapi.Request and fastapi.WebSocket into scoped services, see Request and WebSocket Context in Services.