AngularJS ng-repeat 显示来自 JSON 数据的组名

Question

Display 如何使用以下 JSON 数据存储、书签、收藏夹

JSON数据(vm.bookmarks):

[
    {
        "category": "stores",
        "title": "store1",
        "link": "http://www.store1.com",
    },
    {
        "category": "stores",
        "title": "store1",
        "link": "http://www.store2.com",
    },
    {
        "category": "bookmarks",
        "title": "bookmark1",
        "link": "http://www.bookmark1.com",
    },
    {
        "category": "bookmarks",
        "title": "bookmark2",
        "link": "http://www.bookmark2.com",
    },
    {
        "category": "bookmarks",
        "title": "bookmark3",
        "link": "http://www.bookmark3.com",
    },
    {
        "category": "favorites",
        "title": "favorites1",
        "link": "http://www.favorites1.com",
    },
    {
        "category": "favorites",
        "title": "favorites2",
        "link": "http://www.favorites2.com",
    }
]

我只想使用 ng-repeat:

列出类别名称

<div ng-repeat="item in vm.bookmarks|groupBy:'category'">
    <h2>{{item.category}}</h2>
</div>

我要显示这个：

商店
书签
收藏夹

但是什么都不显示！我做错了什么？

P.S

我在使用过滤器时没有注入任何东西，就像这样：

<div ng-repeat="item in vm.bookmarks|filter:{category:'flyers'}" >
    <a href="{{item.link}}">{{item.title}}</a>
</div>

不确定我是否需要注入 angular-filter 来使用 groupBy 过滤器 - 为什么？

Answer 1

你不需要使用 (key, value) ，你还需要注入 angular.filter 作为依赖

var MyApp = angular.module("MyApp",['angular.filter']);

<ul class="nav nav-tabs" data-tabs="tabs" 
    ng-repeat="bookmark in vm.bookmarks|groupBy:'category'">
    <li><a href="@tabid" data-toggle="tab">{{bookmark.category}}</a></li>
</ul>

演示版

var app = angular.module("myApp", ['angular.filter']);
app.controller("SimpleController", function($scope) {
  this.bookmarks = [
    {
        "category": "stores",
        "title": "store1",
        "link": "http://www.store1.com",
    },
    {
        "category": "stores",
        "title": "store1",
        "link": "http://www.store2.com",
    },
    {
        "category": "bookmarks",
        "title": "bookmark1",
        "link": "http://www.bookmark1.com",
    },
    {
        "category": "bookmarks",
        "title": "bookmark2",
        "link": "http://www.bookmark2.com",
    },
    {
        "category": "bookmarks",
        "title": "bookmark3",
        "link": "http://www.bookmark3.com",
    },
    {
        "category": "favorites",
        "title": "favorites1",
        "link": "http://www.favorites1.com",
    },
    {
        "category": "favorites",
        "title": "favorites2",
        "link": "http://www.favorites2.com",
    }
];
var vm = this;
  
});

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-filter/0.5.16/angular-filter.js" > </script>
<body ng-app="myApp">
    <div>
      <div data-ng-controller="SimpleController as vm">
      <ul class="nav nav-tabs" data-tabs="tabs" 
    ng-repeat="(key, value) in (vm.bookmarks|groupBy:'category')">
    <div ng-repeat="cat in value | unique:'category' ">
          <h1> {{cat.category}}</h1>
    </div>
  </ul>
        </div>
    </div>
</body>

</html>

AngularJS ng-repeat 显示来自 JSON 数据的组名

AngularJS ng-repeat to display group names from JSON data

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angularjs-ng-repeat