如何在Firebase Javascript中获取子项的价值？ [英] How to get the value of children in Firebase Javascript?

问题描述

这是我的Firebase数据库：

This is my Firebase Database:

我需要与push方法生成的唯一随机名称相关联的图像的URL。有什么办法可以吗？此外，必须存在更好的数据发送方式。请告诉我。谢谢。

I need the URLs of the images that are associated alongside the unique random name generated by the push method. Is there any way I could do that? Also, there must exist a better way of sending data. Please, let me know. Thanks.

imgRef.on('value', function(snapshot) {
console.log(snapshot.val());
});

正如预期的那样，返回整个JSON对象。我需要URL。

This is, as expected, returning the entire JSON object. I need the URL.

推荐答案

这是显示图片网址列表的最基本方式：

This is the most basic way to show the list of image URLs:

var rootRef = firebase.database.ref();
var urlRef = rootRef.child("user1/DAA Notes/URL");
urlRef.once("value", function(snapshot) {
  snapshot.forEach(function(child) {
    console.log(child.key+": "+child.val());
  });
});

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