javascript - 每 3 个项目拆分 ng-repeat

Question

我使用 AngularJS 遍历一个包含事件对象数组和竞争对象数组的 JSON 对象。

我希望显示每个 event在一个表中，然后每个 competition在td , 但每行只有三个单元格

我正在使用 ng-repeat 返回每个事件的表格列表，但我无法将比赛拆分为新的 <tr>每三个<td>

除了从 JSON 重建我自己的大型对象外，执行我在 Angular 中描述的内容的最佳方法是什么？

---

当前 View :

<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>

---

Controller :

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列表。您应该考虑使用 <ul><li> 输出它而不是网格。

<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>

使用上述 HTML，您可以很容易地通过 CSS 实现所需的布局。查看 Twitter Bootstrap 或 Foundation 中的“ block 网格”以获取示例。表格通常应该只用于实际上是表格的数据。

但是……

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。您可以为此使用一个函数来一次获取三个东西:

<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 Controller 中，您可以创建一个“列表的列表”来绑定(bind)到嵌套的转发器

// 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);
}