ng-repeat不允许我访问JSON数据

Question

我有一个引发重复错误的json。我的json看起来像：

    //console.log(json) shows it as 
    Object{
      IsCanceled: false
      IsCompleted: true
      Results: "{"folders": [{"name": "Hello", "age": 21},{"name": "World","age": 25}]}"
     }

我试过了：

   //No error happen with this one but no data shows up as well
   <tr ng-repeat="f in Results.folders">
     <td>
      {{f.name}}
     </td> 
   </tr>

此外：

  <tr ng-repeat="f in Results">
    <td ng-repeat="s in f.folders">
     {{s.name}}
     </td> 
   </tr>

另外：

 //Considering all names are different 
 <tr ng-repeat="f in Results.folders track by f.name">
    <td>
      {{f.name}}
    </td> 
 </tr>

所有这些都抛出了ng-repeat duplicates错误，我无法弄清楚原因。

错误消息： 错误：[ngRepeat：dupes]不允许在转发器中重复。使用'track by'表达式指定唯一键。 Repeater：s in sc.scans.Result，Duplicate key：string：“，Duplicate value：”