实时数据库订阅不工作：Firebase

Question

我有一个设置来监听 firebase 数据库中的实时变化：

这是路径的样子： Path = funfuse/users/connected-users/AfYXmJroEKQwnhiFXXXXXiyblti22

这就是我的数据库的结构：

当我尝试向最后一个子项（即connected-users ）添加条目时，它会在数据库中更新，但即使我的应用程序在我的 web 浏览器上运行，我也没有收到任何更新日志消息：

 useEffect(() => {
    if (isLoggedIn && firebaseToken !== '') {
      const path = `${rdb_paths.funfuse_connected_users}/${user?.uid ?? ''}`;
      const connectionsRef = ref(rdb, path);
      console.log('Path = ', path);

      onValue(connectionsRef, (snapshot) => {
        console.log('Values = ', snapshot.val());
      });
      return () => {
        console.log('Switching off listening');
        off(connectionsRef);
      };
    }
  }, [firebaseToken, isLoggedIn, user?.uid]);

我在这里做错了什么吗？ 为什么我无法获取更新。 这是我的安全规则：

{
  "rules": {
    "funfuse": {
      "users": {
        "requests-users": {
          "$uid": {
            ".read":"$uid === auth.uid && auth.token.email_verified === true",
            ".write":"$uid === auth.uid && auth.token.email_verified === true"
          }
        },
        "requested-users": {
          "$uid": {
            ".read":"$uid === auth.uid && auth.token.email_verified === true",
            ".write":"$uid === auth.uid && auth.token.email_verified === true"
          }
        },
       "connected-users": {
        "$uid": {
          ".read":"$uid === auth.uid && auth.token.email_verified === true",
          ".write":"$uid === auth.uid && auth.token.email_verified === true"
        }
      } 
      }
    }
  }
}

我确实运行了一个模拟来读取和写入数据，它运行良好。 我是否需要添加额外的规则来监听数据更新？

Answer 1

我意识到问题是因为它使用default数据库 Url，因为我没有在我的配置 object 中传递它：

const firebaseConfig = {
  apiKey: process.env.NEXT_PUBLIC_FB_CLIENT_API_KEY,
  authDomain: process.env.NEXT_PUBLIC_FB_CLIENT_AUTH_DOMAIN,
  projectId: process.env.NEXT_PUBLIC_FB_CLIENT_PROJECT_ID,
  storageBucket: process.env.NEXT_PUBLIC_FB_CLIENT_STORAGE_BUCKET,
  messagingSenderId: process.env.NEXT_PUBLIC_FB_CLIENT_MESSAGING_SENDER_ID,
  appId: process.env.NEXT_PUBLIC_FB_CLIENT_APP_ID,
  measurementId: process.env.NEXT_PUBLIC_FB_CLIENT_MEASUREMENT_ID,
};

将以上内容更改为：

const firebaseConfig = {
  apiKey: process.env.NEXT_PUBLIC_FB_CLIENT_API_KEY,
  authDomain: process.env.NEXT_PUBLIC_FB_CLIENT_AUTH_DOMAIN,
  projectId: process.env.NEXT_PUBLIC_FB_CLIENT_PROJECT_ID,
  storageBucket: process.env.NEXT_PUBLIC_FB_CLIENT_STORAGE_BUCKET,
  messagingSenderId: process.env.NEXT_PUBLIC_FB_CLIENT_MESSAGING_SENDER_ID,
  appId: process.env.NEXT_PUBLIC_FB_CLIENT_APP_ID,
  measurementId: process.env.NEXT_PUBLIC_FB_CLIENT_MEASUREMENT_ID,
  databaseURL: process.env.NEXT_PUBLIC_FB_CLIENT_DB_URL,
};

为我解决了这个问题。