channel_layer.send 不調用處理程序

Question

我有這個信號在創建新消息時發送事件

from django.db.models.signals import post_save
from channels.layers import get_channel_layer
from asgiref.sync import async_to_sync
from django.dispatch import receiver

from .serializers import MessageSerializer
from base.models import Message

@receiver(post_save, sender=Message)
def new_message(sender, instance, created, **kwargs):
    channel_layer = get_channel_layer()

    if created:
        chat_group = instance.channel.chat_group
        for member in chat_group.members:
            async_to_sync(channel_layer.send)(
                f"User-{member.user.id}",
                {
                    "type": "chat_message_create",
                    "payload": MessageSerializer(instance).data,
                },
            )

這是consumers.py

import json
from channels.generic.websocket import WebsocketConsumer

from api.serializers import UserSerializer


class ChatConsumer(WebsocketConsumer):
    def connect(self):
        user = self.scope["user"]
        self.channel_name = f"User-{user.id}"
        self.send(text_data=json.dumps(UserSerializer(user).data))

    def disconnect(self, close_code):
        pass

    def chat_message_create(self, event):
        print("Created")
        self.send(text_data=json.dumps(event["payload"]))

當我在管理面板中創建一條新消息時，信號被調用但它不會通過 websocket 發送，並且ChatConsumer.chat_message_create中的任何調試打印甚至都不會被打印出來。

Answer 1

修復了這個問題，我重新設計了消費者以使用群組而不是單一渠道