implementing Using `asyncio` and Django Channels for Real-Time Notifications
I'm performance testing and I'm upgrading from an older version and I'm experimenting with I'm stuck on something that should probably be simple..... I'm trying to implement real-time notifications in my Django application using Django Channels and `asyncio`. The setup works well for most cases, but I’m working with an scenario where sometimes the notifications are not being sent, and I don’t see any behavior messages in the logs. Here's a simplified version of my code: ```python # consumers.py import asyncio from channels.generic.websocket import AsyncWebsocketConsumer class NotificationConsumer(AsyncWebsocketConsumer): async def connect(self): await self.accept() async def receive(self, text_data): await self.send(text_data='Notification received!') async def send_notification(self, message): await self.send(text_data=message) # notifications.py import asyncio from channels.layers import get_channel_layer from asgiref.sync import async_to_sync async def notify_users(user_ids, message): channel_layer = get_channel_layer() for user_id in user_ids: await channel_layer.group_send( f'user_{user_id}', {'type': 'send_notification', 'message': message} ) # views.py from django.http import JsonResponse from .notifications import notify_users async def trigger_notification(request): await notify_users([1, 2, 3], 'Hello Users!') return JsonResponse({'status': 'notification sent'}) ``` When I call the `trigger_notification` view, sometimes the notifications just don’t go through even though there are no exceptions thrown. I’ve confirmed that the WebSocket connections are active. I also tried adding logging but it doesn’t show anything unusual. Is there something I might be missing regarding the lifecycle of the asynchronous tasks with Django Channels? Any insights on how to ensure that the notifications are reliably sent would be greatly appreciated! This is part of a larger web app I'm building. What's the best practice here? Any feedback is welcome! I'm working on a service that needs to handle this. Could someone point me to the right documentation? Any suggestions would be helpful. I'm coming from a different tech stack and learning Python. Any ideas what could be causing this?