Get Started

Service Injection

Pass a service into a controller through DI and leave manual assembly outside.

Get StartedFirst Service

Autumn uses explicit constructor-based dependency declarations.
If a controller needs a service, just add it to __init__ and the container will provide the required instance automatically.

Controller + Service

from autumn.controller import REST, get
from autumn.response import JSONResponse

from app.services.greeting import GreetingService

@REST(prefix = '/hello')
class HelloController:
    def __init__(self, service: GreetingService) -> None:
        self.service = service
    
    @get('/{name:str}')
    async def hello_by_name(self, name: str) -> JSONResponse:
        return JSONResponse({
            'message' : self.service.build_message(name)
        })

What This Gives You

Dependencies are declared explicitly in the constructor.
The controller is not responsible for creating services.
The DI container manages the object lifecycle.

This is the Autumn approach: dependencies stay explicit while component wiring happens automatically.

Minimal Service

Wiring Everything