FastAPI / enable wiring for the DynamicContainer

Hello, I am struggled to implements FastAPI endpoints to work with DynamicContainer, something like this:

from dependency_injector import providers
from dependency_injector.containers import DynamicContainer
from dependency_injector.wiring import Provide
from fastapi import FastAPI, Depends, APIRouter


class ProductServices:
    def __init__(self):
        self.product_prefix = "P_"

    def get_product(self, product_id: int):
        return f"{self.product_prefix}{product_id}"


class RatingServices:
    def __init__(self, product_services=None):
        self.product_services = product_services

    def rate(self, product_id: int, point: int):
        product = self.product_services.get_product(product_id=product_id)
        return f"{product} has been rated {point} points"


router = APIRouter()


@router.get('/rate')
def rating(
        rating_services: RatingServices = Depends(Provide['rating_services'])
):
    if rating_services:
        return {
            'msg': rating_services.rate(10, 1)
        }


def populate_container(_container):
    _container.product_services = providers.Factory(ProductServices)
    _container.rating_services = providers.Factory(RatingServices,
                                                   product_services=_container.product_services)


def create_app():
    container = DynamicContainer()
    populate_container(container)

    app = FastAPI()
    app.container = container
    app.include_router(router=router)

    return app


app = create_app()

I can get an instance of rating_services after populate_container by calling container.rating_services() but cannot find a way to inject into FastAPI endpoint. Everytime making a request to /rate endpoint, FastAPI will response that:

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

Please help or show me any workaround. Thanks alot

[rmk135]

I’ve published version 4.30.0 that removes restriction on wiring a dynamic container. My apologies again for the confusion 😃 Closing the issue. Feel free to comment.

[rmk135]

I’ve got an exception while make it wiring: “Can wire only an instance of the declarative container”

Oh, gosh, I’m so sorry…

I tested the code from previous comment on a branch where this exception is already removed. I’ll release that change and you would be able to wire dynamic container.

Apologies for a confusion.