django频道组发送突然不工作

我最近将我现有的django项目转换为react前端。然而，我面临的问题是，我的django频道的后端无法工作。我遇到的问题是，group_send方法在我的情况下不起作用，因此消费者无法接收到我的模型中信号生成的信息。这是我的密码：

消费者.py 型号/信号

---

每当在数据库中创建通知对象时，信号将发送到my

ChannelNotification

，my

接收此信息并通过group send将其发送给消费者。它曾经工作得很好，但我不确定在我将我的项目转换为react作为前端后发生了什么。
似乎缩进有问题，请纠正。似乎缩进有问题，请纠正。
class NotificationConsumer (AsyncJsonWebsocketConsumer):
async def connect (self):
    close_old_connections()
    user = self.scope["user"]
    if not user.is_anonymous:

        await self.accept()
        #connects the user to his/her websocket channel
        group_name = "notifications_{}".format(str(user))
        print(group_name)
        await self.channel_layer.group_add(group_name, self.channel_name)


async def disconnect (self, code):
    close_old_connections()
    user = self.scope["user"]
    if not user.is_anonymous:
        #Notifications
        notifications_group_name = "notifications_{}".format(str(user))
        await self.channel_layer.group_discard(notifications_group_name, self.channel_name)

async def user_notification (self, event):
    close_old_connections()
    print('Notification recieved by consumer')
    await self.send_json({
        'event': 'notification',
        'data': {
            'event_type': 'notification',
            'notification_pk': event['notification_pk'],
            'link': event['link'],
            'date_created': event['date_created'],
            'object_preview': event['object_preview'],
        }
    })
    print(event)

def ChannelNotification(sender, instance, created, **kwargs):
if created:
    channel_layer = get_channel_layer()
    print(channel_layer)
    group_name = "notifications_{}".format(str(instance.target))
    print('inside channel signal')
    print(group_name)

    async_to_sync(channel_layer.group_send)(
        group_name, {
            "type": "user_notification",
            "notification_pk": instance.pk,
            "link": instance.object_url,
            "date_created": instance.time.strftime("%Y-%m-%d %H:%M:%S"),
            "object_preview": instance.object_preview,
        }
    )