👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-12

django channels websocket Python

Hey everyone, I'm running into an issue that's driving me crazy. I'm trying to implement I'm stuck trying to I'm working on a personal project and I tried several approaches but none seem to work... I'm working on a Django application using Django Channels to manage WebSocket connections. I have a consumer that is supposed to send messages to connected clients based on events that are triggered by background tasks. However, after these background tasks complete, it seems like my consumer stops receiving messages, and I get an error `Channel name 'my_channel' does not exist`. I have tried using `AsyncToSync` to ensure that background tasks can send messages back to the consumer, but it doesn't seem to solve the problem. Here's a snippet of my consumer code: ```python from channels.generic.websocket import AsyncWebsocketConsumer import json class MyConsumer(AsyncWebsocketConsumer): async def connect(self): self.room_name = 'my_channel' self.room_group_name = f'chat_{self.room_name}' # Join room group await self.channel_layer.group_add( self.room_group_name, self.channel_name ) await self.accept() async def disconnect(self, close_code): await self.channel_layer.group_discard( self.room_group_name, self.channel_name ) async def receive(self, text_data): text_data_json = json.loads(text_data) message = text_data_json['message'] # Send message to room group await self.channel_layer.group_send( self.room_group_name, { 'type': 'chat_message', 'message': message } ) async def chat_message(self, event): message = event['message'] # Send message to WebSocket await self.send(text_data=json.dumps({ 'message': message })) ``` In my background task, I am using the `database_sync_to_async` decorator to send a message after completing some database operations: ```python from channels.db import database_sync_to_async @database_sync_to_async def send_message_to_channel(message): # This function sends a message to the channel layer async_to_sync(channel_layer.group_send)('chat_my_channel', {'type': 'chat_message', 'message': message}) ``` When I run the application, everything seems fine until the background task completes. After that, the consumer stops processing any further messages, and I see the error mentioned above in my console logs. I am using Django 3.2 and Channels 3.0. Any insights on why this might be happening or how I can ensure that messages continue to be sent to the consumer after the background task is done would be greatly appreciated. My development environment is macOS. What's the best practice here? I'm working on a web app that needs to handle this. Has anyone else encountered this? How would you solve this? What's the correct way to implement this? Thanks, I really appreciate it!