如何从 Firebase Web 检索特定数据

Question

firebase的json文件是这样的

{
  "users": {
    "a540678c0fda89f430bfba480ffe6f40146548bad72c199f8536b167fc58455a" : {
      "password" : "2a97516c354b68848cdbd8f54a226a0a55b21ed138e207ad6c5cbb9c00aa5aea",
      "phone" : "+91xxxxxxx",
      "uid" : "demo"
    }
  }
}

如何使用 ref().once().then() 语法获取密码、电话和 uid 的值

Answer 1

这应该可行：

var ref = firebase.database().ref("users/a540678c0fda89f430bfba480ffe6f40146548bad72c199f8536b167fc58455a");
ref.once("value").then(function(snapshot) {
  var user = snapshot.val();
  console.log(user.password, user.phone, user.uid);
});