Adding database access in consumers.py
using AsyncWebcocketConsumer to add database access instead of using WebsocketConsumer, this is base on the channels tutorial.
# chat/consumers.py import json from channels.generic.websocket import AsyncWebsocketConsumer class ChatConsumer(AsyncWebsocketConsumer): async def connect(self): self.room_name = self.scope['url_route']['kwargs']['room_name'] self.room_group_name = 'chat_%s' % 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): # Leave room group await self.channel_layer.group_discard( self.room_group_name, self.channel_name ) # Receive message from WebSocket 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 } ) # Receive message from room group async def chat_message(self, event): message = event['message'] # Send message to WebSocket await self.send(text_data=json.dumps({ 'message': message }))
Now you can use the database access using database_sync_to_async
from channels.db import database_sync_to_async async def connect(self): self.username = await database_sync_to_async(self.get_name)() def get_name(self): return User.objects.all()[0].name
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