initkwargs wasn't set in result consumer about channels

[J4CKVVH173]

I found out that my extra instances just ignored inside Consumer. Are there any other ways to pass extra instance inside ?

[carltongibson]

You can only set attributes that exist on the class already. Set them as empty attributes on your class and then you can pass them as kwargs to as_asgi()

[J4CKVVH173]

You can only set attributes that exist on the class already. Set them as empty attributes on your class and then you can pass them as kwargs to as_asgi()

I did it of course
It looks like

class My consumer(AsyncWebSocketConsumer):

     extra_class = None

I've tried with None and without. With None I got error that extra class is none. Without None I wrote above

[carltongibson]

You can see the code here:

channels/channels/consumer.py

Lines 84 to 101 in 2db92cc

	def as_asgi(cls, **initkwargs):
	"""
	Return an ASGI v3 single callable that instantiates a consumer instance
	per scope. Similar in purpose to Django's as_view().
	initkwargs will be used to instantiate the consumer instance.
	"""
	async def app(scope, receive, send):
	consumer = cls(**initkwargs)
	return await consumer(scope, receive, send)
	app.consumer_class = cls
	app.consumer_initkwargs = initkwargs
	# take name and docstring from class
	functools.update_wrapper(app, cls, updated=())
	return app

The initkwargs are passed to the consumer on line 93:

channels/channels/consumer.py

Line 93 in 2db92cc

consumer = cls(**initkwargs)

So from the look of your example you'd need to assign that perhaps...

    self.extra_class = extra_class

? 🤔

[J4CKVVH173]

I didn't get it, could you please explain your idea ?

I can show you what I'm trying to do.

This is my urls.py

from uuid import UUID

from django.urls import path

from .classes import SessionConsumer
from .repositories import InMemorySessionRepository, WebsocketClientRepository

# Move to redis
session_map: dict[UUID, str] = {}
repositories = {
    'client_repository': WebsocketClientRepository(session_map),
    'session_repository': InMemorySessionRepository(session_map),
}



websocket_urlpatterns = [
    path('session/', SessionConsumer.as_asgi(**repositories)),
]

As you can see I have two extra exteranl class - WebsocketClientRepository, InMemorySessionRepository and I am trying to pass them inside SessionConsumer.

and this is SessionConsumer

from channels.generic.websocket import AsyncJsonWebsocketConsumer
from django.conf import settings
from core.application.classes import Viewer
from core.application.repositories import ClientRepository
from core.infrastructure.repositories import HttpPresenterRepository

from .repositories import SessionRepository


class SessionConsumer(AsyncJsonWebsocketConsumer):

    client_repository: ClientRepository
    session_repository: SessionRepository

    async def connect(self):
        await self.accept()

    async def receive_json(
        self, content: dict | None = None, bytes_data: bytes | None = None
    ):
        access_token = content['credentials']['access']
        presenter_repository = HttpPresenterRepository(
            access_token, settings.PRESENTER_URL
        )
        # Error here
        viewer = Viewer(self.client_repository, presenter_repository)  # noqa

And I can't get access to client repository inside SessionConsumer

This is the error.
AttributeError: 'SessionConsumer' object has no attribute 'client_repository'

If I use None as default state for client_repository I get error that self.cloent_session is None.

[J4CKVVH173]

And yeah I checked the source code and I got the idea that I can rewrite the __init__ method for chanels' consumer. But I want to use out of box solution if it's posible of course.

[J4CKVVH173]

My solution

from channels.generic.websocket import AsyncJsonWebsocketConsumer

class AsyncJsonConsumer(AsyncJsonWebsocketConsumer):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        for key, value in kwargs.items():
            setattr(self, key, value)