每3个项目拆分ng-repeat

Question

使用AngularJS,我迭代一个JSON对象,该对象包含一个事件对象数组,包含一个竞争对象数组.

我希望将每个显示event在一个表中,然后每个表示competition一个td,但每行只有三个单元格

我正在使用ng-repeat来返回每个事件的表格列表,但是我很难将比赛分成<tr>每三个一个新的比赛<td>.

除了从JSON重建我自己的大型对象之外,在Angular中执行我所描述的最好的方法是什么？

---

目前来看:

<table ng-repeat="listing in listings">
    <tr>
        <th colspan="3">{{listing.name}}</th>
    </tr>
    <tr>
        <td ng-repeat="competition in listing.competitions">
            {{competition.id}} - {{competition.name}}
        </td>
    </tr>
</table>

期望的输出:

<table>
    <tr>
        <th colspan="3">Event Name</th>
    </tr>
    <tr>
        <td>competition id - competition name</td>
        <td>competition id - competition name</td>
        <td>competition id - competition name</td>
    </tr>
    <tr>
        <td>competition id - competition name</td>
        <td>competition id - competition name</td>
        <td>competition id - competition name</td>
    </tr>
</table>

---

控制器:

app.controller('EventsCtrl', function ($scope, $http) {
  $scope.loading = true;

  $http.get('scripts/JSON/events.json').then(function (response) {
    var listings = response['data'].events;

    $scope.listings = listings;
  });
});

events.json

{
"events": [
    {
        "id": 418,
        "name": "et ullamco",
        "competitions": [
            {
                "id": 933,
                "name": "qui in deserunt occaecat et",
                "startTime": 1381092189
            },
            {
                "id": 853,
                "name": "eu enim ex incididunt do",
                "startTime": 1380708266
            },
            {
                "id": 5738,
                "name": "ad est ut aliquip et",
                "startTime": 1381366623
            },
            {
                "id": 7599,
                "name": "sit ex voluptate aliqua dolor",
                "startTime": 1381284106
            },
            {
                "id": 7481,
                "name": "laborum consequat deserunt do aliqua",
                "startTime": 1380874273
            },
            {
                "id": 3441,
                "name": "amet reprehenderit sint sunt proident",
                "startTime": 1380554850
            },
            {
                "id": 1959,
                "name": "ullamco minim minim in voluptate",
                "startTime": 1380651981
            }
        ]
    },

Answer 1

您正在使用表格，但数据的语义表明您有一个列表的列表。您应该考虑使用<ul><li>而不是网格来输出它。

<ul ng-repeat="listing in listings">
    <li>
        <h2>{{listing.name}}</h2>
        <ul ng-repeat="competition in listing.competitions">
            <li>
              {{competition.id}} - {{competition.name}}
            </li>
        </ul>
    </li>
</ul>

您可以使用上面的 HTML 轻松地通过 CSS 实现您想要的布局。查看 Twitter Bootstrap 或 Foundation 中的“块网格”作为示例。表格通常应仅用于实际为表格的数据。

然而...

您的问题仍然值得回答，因为可能有其他原因按照您建议的方式替换模板。您可以使用一个函数来一次获取三个内容：

<table ng-repeat="listing in listings">
    <tr>
        <th colspan="3">{{listing.name}}</th>
    </tr>
    <tr ng-repeat="group in competitions">
        <td ng-repeat="competition in group">
            {{competition.id}} - {{competition.name}}
        </td>
    </tr>
</table>

在您的控制器中，您可以创建一个“列表列表”来绑定到嵌套转发器

// Adapted from Fresheyeball's solution

$scope.competitions = []
compSet = []
for(var i; i < $scope.listings.competitions; i++){
   var competition = $scope.listings.competitions[i];
   if( i % 3 ){
      $scope.competitions.push(compSet);
      compSet = [];
   }
   compSet.push(competition);
}