当我使用 firebase.database().goOnline(); 我得到一个错误

Question

this is my code

admin.initializeApp({...});

var db = admin.database();
let ref = db.ref(...);

await ref.once("value",function () {...},);

firebase.database().goOffline();
firebase.database().goOnline();

 ref.on("value",function () {...},);
);

when i use firebase.database().goOnline(); I get an error

Firebase: No Firebase App '[DEFAULT]' has been created - call Firebase App.initializeApp() (app/no-app).
    at app

Answer 1

You're mixing two ways of addressing Firebase.

You can access Firebase through:

1. Its client-side JavaScript SDK, in which case the entry point is usually called firebase .
2. Its server-side Node.js SDK, in which case the entry point is usually called admin .

Now you initialize admin , but then try to access firebase.database() . And since you did call admin.initializeApp that's where the error comes from.

My guess is that you're looking for admin.database().goOnline() or db.goOnline() .

Also note that there is no reason to toggle goOffline() / goOnline() in the way you do now, and you're typically better off letting Firebase manage that on its own.