遍历嵌套的firebase对象 - Javascript [英] Iterating through nested firebase objects - Javascript

问题描述

 刊物 -  
 | 
 | -Folder1 ------ 
 | | -hdgjg76675e6r- 
 | | | -Name 
 | | |  - 作者
 | | 
 | | + -hdgjdsf3275e6k 
 | | + -hd345454575e6f 
 | + -Folder2 
  

在出版物中，我有文件夹和文件夹I有对象（包含属性，如名称，作者）

我已经遍历文件夹到现在。

  snapshot.forEach（function（snapshot）{
 var key = snapshot.key（）; 
 var obj = snapshot.val（）; 
 console.log（key）; 
 //输出=> Folder1，Folder2等
}）; 
  

当我打印 obj

时，

  console.log（obj）; 
  

显示

如何迭代 obj 变量，因为它包含 hdgjg76675e6r ， hdgjdsf3275e6k 等等，还有哪些？

obj 只是一个普通的javascript对象，你可以使用一个简单的for循环：

  console.log（obj [key]）; 
 
 $ / code> 

或者您可以再次使用 forEach 你的快照：

$ p $ folderSnapshot.forEach（function（objSnapshot）{
objSnapshot.forEach（function （快照）{
var val = snapshot.val（）;
console.log（val）; //打印对象
}）;
}）;





How to iterate through nested firebase objects.

Publications-
            |
            |-Folder1------
            |             |-hdgjg76675e6r-
            |             |               |-Name
            |             |               |-Author
            |             |
            |             |+-hdgjdsf3275e6k
            |             |+-hd345454575e6f
            |+-Folder2

In publications I have folders and in folders I have objects (containing properties like. Name, Author)

I have iterated through folders till now.

snapshot.forEach(function (snapshot) {
    var key = snapshot.key();
    var obj = snapshot.val();
    console.log(key);
    //output => Folder1 , Folder2 etc
});

When I print obj

console.log(obj);

It displays

How do I iterate through obj variable as it contains hdgjg76675e6r , hdgjdsf3275e6k etc and further?

解决方案

You obj is just a normal javascript object, you can just use a simple for loop:

for(var key in obj) {
    console.log(obj[key]);
}

or you can use again a forEach on your snapshot:

folderSnapshot.forEach(function (objSnapshot) {
    objSnapshot.forEach(function (snapshot) {
        var val = snapshot.val();
        console.log(val); // Should print your object
    });
});

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