嵌套的ng-repeat在IE8中不起作用

Question

我在AngularJS 1.2.28中有一个单页面应用程序,我正在努力让它在IE8中正常工作.

特别是我有一个嵌套ng-repeats 的问题,用于显示以下bigObject声明的内容MainController:

angular.module('singlePageApp')
  .controller('MainController',
    ['$scope',
    function ($scope) {
        $scope.showLittleObjectsList = false;
        $scope.bigObject = {
        objects: [
            {
                name: "NAME1",
                metadata: [

                    {index: 0, desc: "metadataQ"},
                    {index: 0, desc: "metadataF"},
                    {index: 1, desc: "metadataZ"},
                    {index: 1, desc: "metadataL"}

                ]
            },
            {
                name: "NAME2",
                metadata: [

                    {index: 0, desc: "metadataH"},
                    {index: 0, desc: "metadataX"}

                ]
            },
            {
                name: "NAME3",
                metadata: [

                    {index: 0, desc: "metadataU"},
                    {index: 1, desc: "metadataG"},
                    {index: 2, desc: "metadataS"},
                ]
            },
            {
                name: "NAME4",
                metadata: [

                    {index: 0, desc: "metadataK"},
                    {index: 1, desc: "metadataR"},
                    {index: 1, desc: "metadataW"},
                    {index: 2, desc: "metadataN"},    
                    {index: 2, desc: "metadataC"}

                ]
            }
            ]
        };
}]);

主HTML块是这样的(注意showLittleObjectsList = false;在开头的控制器中,仅用于向用户显示列表):

<div ng-repeat="littleObject in bigObject.objects | orderBy:'name':false">
    <div>
        <button type="button" class="btn btn-default btn-sm" ng-click="showLittleObjectsList = !showLittleObjectsList">
            <span class="glyphicon glyphicon-chevron-right" ng-hide="showLittleObjectsList"></span>
            <span class="glyphicon glyphicon-chevron-down" ng-show="showLittleObjectsList"></span>
        </button>
        <span>{{littleObject.name}}</span>
    </div>
    <div ng-show="showLittleObjectsList">
        <div>
            <div ng-include="'path/to/singledata/template.html'"></div>
        </div>
    </div>
</div>

该template.html单个数据的是这样的(所述groupBy过滤器属于角滤波器):

<div ng-repeat="(key, metadata) in littleObject.metadata | groupBy:'index'">
    <div ng-show="$first">
        <strong>
            Metadatum desc
        </strong>
    </div>
    <div ng-repeat="metadatum in metadata">
        <div>
            {{metadatum.desc}}
        </div>
    </div>
</div>

所有这些代码在Chrome,Firefox甚至IE11中运行良好,给我这样的东西(前者v用于插入,因为showLittleObjectsList = true;):

v NAME1
________________________________________
|   Metadata desc:                      |
|   metadataA                           |
|   metadataF                           |
|   metadataZ                           |
|   metadataL                           |
|_______________________________________|

v NAME2
________________________________________
|   Metadata desc:                      |
|   metadataH                           |
|   metadataX                           |
|_______________________________________|

v NAME3
________________________________________
|   Metadata desc:                      |
|   metadataU                           |
|   metadataG                           |
|   metadataS                           |
|_______________________________________|

v NAME4
________________________________________
|   Metadata desc:                      |
|   metadataK                           |
|   metadataR                           |
|   metadataW                           |
|   metadataN                           |
|   metadataC                           |
|_______________________________________|

可悲的是在IE8中,最里面的ng-repeat是坚持第一个littleObject元数据,给我这样的东西:

v NAME1
________________________________________
|   Metadata desc:                      |
|   metadataA                           |
|   metadataF                           |
|   metadataZ                           |
|   metadataL                           |
|_______________________________________|

v NAME2
________________________________________
|   Metadata desc:                      |
|   metadataA                           |
|   metadataF                           |
|   metadataZ                           |
|   metadataL                           |
|_______________________________________|

v NAME3
________________________________________
|   Metadata desc:                      |
|   metadataA                           |
|   metadataF                           |
|   metadataZ                           |
|   metadataL                           |
|_______________________________________|

v NAME4
________________________________________
|   Metadata desc:                      |
|   metadataA                           |
|   metadataF                           |
|   metadataZ                           |
|   metadataL                           |
|_______________________________________|

我怎样才能在IE8中使用它？

---

小编辑

这个问题所困扰,我尽量不使用ng-include的singledata/template.html,而不是我残酷地包含在主HTML,它看起来像现在这样分:

<div ng-repeat="littleObject in bigObject.objects | orderBy:'name':false">
    <div>
        <button type="button" class="btn btn-default btn-sm" ng-click="showLittleObjectsList = !showLittleObjectsList">
            <span class="glyphicon glyphicon-chevron-right" ng-hide="showLittleObjectsList"></span>
            <span class="glyphicon glyphicon-chevron-down" ng-show="showLittleObjectsList"></span>
        </button>
        <span>{{littleObject.name}}</span>
    </div>
    <div ng-show="showLittleObjectsList">
        <div>
            <div ng-repeat="(key, metadata) in littleObject.metadata | groupBy:'index'">
                <div ng-show="$first">
                    <strong>
                        Metadatum desc
                    </strong>
                </div>
                <div ng-repeat="metadatum in metadata">
                    <div>
                        {{metadatum.desc}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

不幸的是,这并没有解决问题.

---

编辑

该目标的一个重要部分是显示列表及其metadata分组index.我添加了一个完整的控制器代码,最终我修改metadata了分组的索引以使其更有意义.

Answer 1

我已经看到了一些非常相似的东西,我在那里分组数据,然后在该组上使用ng-repeat.可悲的是,我找到的唯一解决方案是创建自己的函数,返回一个扁平列表.

问题(我认为)是ie-8不足以保持重复范围和超时,通过使用一个函数它只会执行一次计算,从而降低所需的原始处理能力.

只是为了帮助,这里是我创建的分组功能,我已对其进行了修改,因此它应该与上面的数据一起使用,只需调用该函数,然后重复执行组.

         $scope.generateGroups = function(littleObject) {
            $scope.groups = [];
            var options = [];
            littleObject.metadata.forEach(function (item, index) {
                    var groupIndex = $.inArray(item['index'], options);
                    if (groupIndex >= 0) {
                        $scope.groups[groupIndex].push(item);
                    } else {
                        options.push(item['index']);
                        var test =  [item];
                        $scope.groups.push(test);
                    }
            });
            $scope.apply();
        }