runtime error TypeError: __call__() missing 2 required positional arguments: 'receive' and 'send'

[harshilsuthar]

I was following the django-channels document and create a new conda env with python, Django and channels. there is no issue with dependency.

when i add 'channels' in installed apps then call view i got TypeError: call() missing 2 required positional arguments: 'receive' and 'send'
internal server error (500)

I don't know what to do

[adamchainz]

Conda may not install matching versions correctly. Did you use pip to install?

[harshilsuthar]

Conda may not install matching versions correctly. Did you use pip to install?

thank you very much, it helped.
I have created a conda env with python and install channels using pip.

[Lukas-drz]

Hello, I have the same issue, can someone help me please ?
I'm stuck all day long...

[carltongibson]

Maybe you forgot an as_asgi() on your consumers?

[Lukas-drz]

from channels.generic.websocket import AsyncWebsocketConsumer
import json
from django.urls import path, re_path

class NotificationConsumer(AsyncWebsocketConsumer):
    async def connect(self):
        # Vérifier l'authentification ici
        await self.accept()
        await self.channel_layer.group_add("notifications", self.channel_name)
        await self.send(text_data=json.dumps({
            'type': 'connected',
            'message': 'Connecté avec succès'
        }))

    async def disconnect(self, close_code):
        await self.channel_layer.group_discard("notifications", self.channel_name)

    async def receive(self, text_data):
        text_data_json = json.loads(text_data)
        message = text_data_json['message']
        # Traiter les données envoyées par le script ici
        await self.channel_layer.group_send(
            "notifications",
            {
                'type': 'notification_message',
                'message': message
            }
        )

websocket_urlpatterns = [
    path("ws", NotificationConsumer.as_asgi()),
]

This is my consummers.py

[carltongibson]

I think you need to check all your versions.

TypeError: NotificationConsumer () missing 2 required positional arguments: 'receive' and 'send'

This looks like trying to instantiate a legacy application, implying an out-of-date Channels (or asgiref, or ...)

[Lukas-drz]

It is very strange because I'm using the latest ones...

[carltongibson]

If you put a minimal reproduce in a sample project and open a fresh issue I can have a look.

(Can't say much from fragments and screenshots alone)

[Lenvia]

It is very strange because I'm using the latest ones...

I had the same issue and I tried restoring channels back to version3 and it worked.
pip install channels==3
But it seems to have some compatibility issues with django 4.0, like AuthMiddlewareStack.