Firebase orderByChild顺序不正确

问题描述

限时删除！！

1. 我的样本数据

1. 代码

1. Code

      let users_ref = firebase_instance.database().ref('users');

  let amount_of_data = 4;
  let limit_users_ref = users_ref.orderByChild("score").limitToLast(amount_of_data);

  limit_users_ref.once('value', function(snapshot) {


    snapshot.forEach(function(childSnapshot) {

      var childKey = childSnapshot.key;
      var childData = childSnapshot.val();

      console.log([childKey, childData]);
    });


  })

我得到的输出

Output I am getting

从输出中可以看出，数据没有排序。我应该在那里获得test1而不是test3。我做错了什么？

As it can be seen on output, the data is not ordered. I should be getting test1 in stead of test3 there. Anything I am doing wrong?

推荐答案

您的分数是字符串。它们应该是数字。字符串排序不像数字。

Your scores are strings. They should be numbers instead. Strings don't sort like numbers.

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