如何按键对 ng-options 中的数组进行排序? [英] How to sort array in ng-options by key?

问题描述

有这样的数组:

month: Array[13]0: "M"1: "January"2: "February"3: "March"4: "April"5: "May"6: "June"7: "July"8: "August"9: "September"10: "October"11: "November"12: "December"

我愿意:

ng-options="key as value for (key, value) in data.month | orderBy:key"

但是我得到了未排序的选择列表.

But I get unsorted select list.

推荐答案

为了使用带有过滤器的跟踪，请使用 track by.

In order to use tracking with filters use track by.

标记

ng-options="key as value for (key, value) in data.month | orderBy:'key' track by key"

更新

这个 orderBy 永远不会工作，因为你有文字数组.您需要将此数组转换为类似 JSON 的对象，其结构类似于 [{id: 0, value: "M"}, {id: 1, value: "January"},......]

This orderBy will never work because you are having literal array. You need to convert this array to JSON like object which would structured like [{id: 0, value: "M"}, {id: 1, value: "January"},......]

HTML

ng-options="item.id as item.value for items in data.month | orderBy:'id'"

演示 Plunkr

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