"Cannot import ASGI_APPLICATION module %r" % path channels problem - django

Question

I got this error: ImproperlyConfigured("Cannot import ASGI_APPLICATION module %r" % path)
Here is my routing.py:
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.security.websocket import AllowedHostsOriginValidator
from channels.auth import AuthMiddlewareStack
from django.urls import path
from messanger.contacts.consumers import ChatConsumer
application = ProtocolTypeRouter({
# Empty for now (http->django views is added by default)
'websocket': AllowedHostsOriginValidator(
AuthMiddlewareStack(
URLRouter(
[
path('user-notification', ChatConsumer)
]
)
)
)
})
When i remove this line of code, runserver work: from messanger.contacts.consumers import ChatConsumer
But i don't understand what's wrong with my consumers file in contacts app:
from channels.consumer import AsyncConsumer
class ChatConsumer(AsyncConsumer):
async def websocket_connect(self, event):
await self.send({
"type": "websocket.accept",
})
async def websocket_receive(self, event):
await self.send({
"type": "websocket.send",
"text": event["text"],
})

Answer 1

In your settings.py file add:
ASGI_APPLICATION = 'yourappname.asgi.application'

Answer 2

I was able to solve this issue by going in the asgi.py file and import get_asgi_application() which act as tradition http request fallback Like so in asgi.py :
mport os
from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.security.websocket import AllowedHostsOriginValidator
from django.core.asgi import get_asgi_application
from django.urls import path
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
# Initialize Django ASGI application early to ensure the AppRegistry
# is populated before importing code that may import ORM models.
django_asgi_app = get_asgi_application()
from chat.consumers import AdminChatConsumer, PublicChatConsumer
application = ProtocolTypeRouter({
# Django's ASGI application to handle traditional HTTP requests
"http": django_asgi_app,
# WebSocket chat handler
"websocket": AllowedHostsOriginValidator(
AuthMiddlewareStack(
URLRouter([
path("chat/admin/", AdminChatConsumer.as_asgi()),
path("chat/", PublicChatConsumer.as_asgi()),
])
)
),
})

Answer 3

You need to add in your settings.py file :
ASGI_APPLICATION = 'yourappname.routing.application'
and that is because ASGI_APPLICATION is looking for application = ... in your files. And also there could be a potentional problem with your not adding ChatConsumer.as_asgi() in your path which will instantiate a new consumer instance for each connection.