500 error on django channels send message to group - django

Question

I have the following Django channels consumer but when I try to send data to the stocks group،
it returns a 500 error.
Also, I don't get any error logs.
Here is the consumer:
class AuthRequiredConsumer(JsonWebsocketConsumer):
def connect(self):
user = self.scope['user']
print(isinstance(user, AnonymousUser))
if isinstance(user, AnonymousUser):
raise DenyConnection("authentication required")
self.accept()
class ChatConsumer(AuthRequiredConsumer):
groups = ['stocks']
channel_layer_alias = "stocks"
def stocks_data(self, event):
print(event)
return self.send_json({'message': event['text']})
def receive_json(self, content, **kwargs):
channel_layer = get_channel_layer()
async_to_sync(channel_layer.group_send)(
"stocks",
{
"type": "stocks.data",
"text": "Hello there!",
},
)
message = content["message"]
self.send_json({"message": message})
Also, I use this middle to authenticate users by the token:
#database_sync_to_async
def get_user(token_key):
try:
token = Token.objects.get(key=token_key)
return token. user
except Token.DoesNotExist:
return AnonymousUser()
class TokenAuthMiddleware(BaseMiddleware):
def __init__(self, inner):
super().__init__(inner)
async def __call__(self, scope, receive, send):
try:
token_key = (dict((x.split('=') for x in scope['query_string'].decode().split("&")))).get('token', None)
except ValueError:
print("error")
token_key = None
scope['user'] = AnonymousUser() if token_key is None else await get_user(token_key)
return await super().__call__(scope, receive, send)
TokenAuthMiddlewareStack = lambda inner: TokenAuthMiddleware(AuthMiddlewareStack(inner))
And here is the routing config:
application = ProtocolTypeRouter(
{
"http": django_asgi_app,
"websocket": TokenAuthMiddlewareStack(
URLRouter(
[
re_path(r"ws/chat/(?P<room_name>\w+)/$", consumers.ChatConsumer.as_asgi())
]
)
)
,
}
)
I debugged the receive_json method using breakpoints And I saw self.channel_name and self.channel_layer is None!!
Does anyone have an idea what's up with this consumer?

Answer 1

Probably you forgot to set the CHANNEL_LAYERS property at settings file.
CHANNEL_LAYERS = {
"default": {
"BACKEND": "channels_redis.core.RedisChannelLayer",
"CONFIG": {
"hosts": [("127.0.0.1", 6379)],
},
},
}