Angular 1.X中 ng-repeat配合拖拽排序插件引發的問題

如圖 拖拽完 並不會正常排序。發現引發問題的緣由是track by $index
但個人數據渲染須要嵌套ng-repeat

但個人數據渲染用到嵌套ng-repeat,須要獲取外部一層的$index

<tr ng-repeat="yAxis in tmpChartData.yAxis track by outIndex" ng-init="outIndex = $index">
    <th>{{outIndex+2}}</th>
    <th row-index="{{outIndex+1}}" tabindex="-1" editType="string">
        <input type="text" ng-model="selectedElement.module.yAxis[outIndex]">
    </th>
    <th class="editTh" ng-repeat="xAxis in tmpChartData.xAxis" edit-chart-th row-index="{{outIndex+1}}" tabindex="-1">
        <input type="number" ng-model="selectedElement.module.data[outIndex][$index]">
    </th>
</tr>

解決方法 ng-repeat 還有一種 (key,val) in Arr 的寫法 因此只要改寫成

<tr ng-repeat="(outKey,outVal) in tmpChartData.yAxis" ng-init="outIndex = $index">
    <th>{{outKey+2}}</th>
    <th row-index="{{outKey+1}}" tabindex="-1" editType="string">
        <input type="text" ng-model="selectedElement.module.yAxis[$index]">
    </th>
    <th class="editTh" ng-repeat="xAxis in tmpChartData.xAxis" edit-chart-th row-index="{{outIndex+1}}" tabindex="-1">
        <input type="number" ng-model="selectedElement.module.data[outKey][$index]">
    </th>
</tr>