如何在需要时自动更新Django页面？

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

from django.db.models.signals import post_save
from django.dispatch import receiver

@receiver(post_save, sender=MyModel)
def my_handler(sender, instance, **kwargs):
    # 在这里编写自定义代码，以便在保存模型数据时触发页面更新。

# 安装django-channels库
pip install channels

# 在settings.py中添加channels配置
INSTALLED_APPS = [
    ...,
    'channels',
]

# 在项目的routing.py文件中添加WebSocket路由
from channels.routing import route
from myapp.consumers import ws_connect, ws_disconnect, ws_receive

channel_routing = [
    route("websocket.connect", ws_connect),
    route("websocket.disconnect", ws_disconnect),
    route("websocket.receive", ws_receive),
]

# 在consumers.py文件中编写WebSocket处理函数
from channels.generic.websocket import WebsocketConsumer
import json

class WsConsumer(WebsocketConsumer):
    def connect(self):
        # 在这里编写连接建立时的处理代码

    def disconnect(self, close_code):
        # 在这里编写连接断开时的处理代码

    def receive(self, text_data):
        # 在这里编写接收到客户端消息时的处理代码