按 Angular.js 中的公共对象属性过滤数组

Question

我已经为此苦苦挣扎了几个小时。情况是，我有一个应用程序，它以这种 JSON 格式接收有关人员的数据：

"people": [
      {
        "name": "Ivan",
        "city": "Moscow",
        "country": "Russia"
      },
      {
        "name": "John",
        "city": "Seattle",
        "country": "United States"
      },
      {
        "name": "Michael",
        "city": "Seattle",
        "country": "United States"
      }
    ]

我需要根据他们的城市将它们过滤成组（显示在下拉列表中<ul> s.即用户单击"西雅图"并显示带有约翰和迈克尔<li>。

如何做到这一点？

Answer 1

app.controller('FooCtrl', function($scope) {
   $scope.people = [
      {
        "name": "Ivan",
        "city": "Moscow",
        "country": "Russia"
      },
      {
        "name": "John",
        "city": "Seattle",
        "country": "United States"
      },
      {
        "name": "Michael",
        "city": "Seattle",
        "country": "United States"
      }
    ];
});

您可以像这样过滤它：

<div ng-repeat="person in people | filter:{ city: 'Seattle' }">

对于动态搜索：

<div ng-app="demo" ng-controller="FooCtrl"><input type="text" ng-model="search.city" >
  <ul>
     <li ng-repeat = "person in people | filter: search"> {{person.name}</li>
  </ul>
</div>

工作示例

如果您仅使用搜索作为ng模型，它将过滤整个对象。但是当我使用search.city时，它只过滤了该字段。

Answer 2

使用角度过滤器进行分组。您的视图代码将如下所示：

<ul ng-repeat="(key, value) in people | groupBy: 'city'">
  City: {{ key }}
  <li ng-repeat="person in value">
    person: {{ person.name }} 
  </li>
</ul> 

这是一个普伦克。

Answer 3

您可以将过滤器放在选择选项中，该选项限制用户选择来自服务器的一个城市。 https://jsfiddle.net/4bhjm5vu/

应用.js：

angular.module('myApp', [])
.controller('FooCtrl', function($scope) {
    $scope.people = [
    {
        "name": "Ivan",
        "city": "Moscow",
        "country": "Russia"
    },
    {
        "name": "John",
        "city": "Seattle",
        "country": "United States"
   },
   {
       "name": "Michael",
       "city": "Seattle",
       "country": "United States"
   }
];
})
.filter('unique', function() {
    return function(input, key) {
        var unique = {};
        var uniqueList = [];
        for(var i = 0; i < input.length; i++){
            if(typeof unique[input[i][key]] == "undefined"){
                unique[input[i][key]] = "";
                uniqueList.push(input[i]);
            }
        }
        return uniqueList;
    };
});

.html：

<div ng-app="myApp">
    <div ng-controller="FooCtrl">
        <select name="city" ng-model="selectedCity" data-ng-options="person.city as person.city for person in people | unique:'city'"><option data-ng-disabled='true' value="">City</option>
        </select>
        <table class="table">
            <thead>
                <tr>
                    <th>Name</th>
                    <th>City</th>
                    <th>Country</th>
                </tr>
            </thead>
            <tbody>
                <tr ng-repeat="person in people | filter: {city: selectedCity}">
                    <td>{{person.name}}</td>
                    <td>{{person.city}}</td>
                    <td>{{person.country}}</td>
                </tr>
            </tbody>
        </table>
    </div>
</div>

Answer 4

你可以

试试，

<input type="text" ng-model = "search.city" >
<ul>
  <li ng-repeat = "people in peoples | filter: search"> {{people.name}}      </li>
</ul>

看到这个扑通，http://plnkr.co/edit/SxcorUe1uAszY9FqBJXd?p=preview