我使用此解决方案将消息保存到DB Django channels: Save messages to database
但我有一个重复的问题（在数据库中），当用户（消息的作者）有两个或更多的标签在浏览器中打开同一个聊天室。
怎么了？救命啊！

import json
from channels.db import database_sync_to_async
from channels.generic.websocket import AsyncWebsocketConsumer
from .models import Message
class ChatConsumer(AsyncWebsocketConsumer):
    @database_sync_to_async
    def create_chat(self, msg, sender):
        return Message.objects.create(sender=sender, msg=msg)
    async def connect(self):
        self.room_name = self.scope['url_route']['kwargs']['room_name']
        self.room_group_name = 'chat_%s' % self.room_name
        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']
        sender = text_data_json['sender']
        await self.channel_layer.group_send(self.room_group_name, {
            'type': 'chat_message',
            'message': message,
            'sender': sender
        })
    async def chat_message(self, event):
        message = event['message']
        sender = event['sender']
        new_msg = await self.create_chat(sender, message)  # It is necessary to await creation of messages
        await self.send(text_data=json.dumps({
            'message': new_msg.message,
            'sender': new_msg.sender
        }))

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