感谢您的链接，他们是有帮助的。到底这样做有问题。

Thanks for the links, they were helpful. In the end this did the trick.

<script type="text/ng-template" id="field_renderer.html">
    <ol ng-model="folder.folders">
      <strong>{{folder.name}}</strong>
      <ol><li ng-repeat="file in folder.files">{{file.name}}</li></ol>
      <li ng-repeat="folder in folder.folders" ng-include="'field_renderer.html'"></li>
    </ol>
</script>

<ol ng-model="list">
    <li ng-repeat="folder in list" ng-include="'field_renderer.html'"></li>
</ol>