Cloud Functions for Firebase - 创建新用户时写入数据库

我对 Firebase 和 javascript 语言的 Cloud Functions 非常陌生。我试图在每次创建用户写入数据库时​​添加一个函数。这是我的代码：

const functions = require('firebase-functions');
const admin = require('firebase-admin');

admin.initializeApp(functions.config().firebase);

exports.addAccount = functions.auth.user().onCreate(event => {
const user = event.data; // The firebase user
const id = user.uid;
const displayName = user.displayName;
const photoURL = user.photoURL;

return admin.database().ref.child("/users/${id}/info/status").set("ok");} );

what I am trying to do is every time a user signup to my app, the functions wil write into the database that his status is "OK". But my code dosn't work.

我究竟做错了什么？

我发现了问题。问题是不应该使用 ${id}，而且我不应该使用孩子。所以代码应该是这样的：

const functions = require('firebase-functions');
const admin = require('firebase-admin');

admin.initializeApp(functions.config().firebase);

exports.addAccount = functions.auth.user().onCreate(event => {
    const user = event.data; // The firebase user
    const id = user.uid;
    const displayName = user.displayName;
    const photoURL = user.photoURL;

    return admin.database().ref("/users/"+id+"/info/status").set("ok"); 
});