角度递归ng-include,同时跟踪递归深度

时间:2015-09-03 16:14:48

标签: javascript angularjs recursion

我的情况与此问题的答案非常相似:

AngularJS ng-include with nested hierarchy

我有一些格式为

的数据
 $scope.data = {
text: "blah",
comments: 
[
  {
    text: ["blahL11", "blahL12", "blahL13"],
    comments: [
      { 
        text: ["blahL111", "blahL112", "blahL113"] 
      },
      { 
        text: ["blahR111", "blahR112", "blahR113"] 
      }
    ]
  },
  {
    text: ["blahR11", "blahR12", "blahR13"] 
  }
]

};

我用这样的递归ng-include显示它:

  <ul>
   <li>{{data.text}}</li>
   <li ng-repeat="item in data.comments" ng-include="'tree'"></li>
 </ul>

 <script type="text/ng-template" id="tree">
  <ul>
    <li ng-repeat="text in item.text">{{text}}</li>
    <li ng-repeat="item in item.comments" ng-include="'tree'"></li>
  </ul>
</script>

http://plnkr.co/edit/8swLos2V6QRz6ct6GDGb?p=info

但是,我想以某种方式跟踪递归的深度。所以,而不是简单地显示:

-blah
    -blahL11
    -blahL12
    -blahL13
            -blahL111

可以显示

-1. blah    
    -2. blahL11
    -2. blahL12
    -2. blahL13
        -3. blahL111

没有我修改数据结构(因为深度只是真正用于显示?)。我可以在ng-include中插入一个变量,是否可以使用某种递归$ index?

1 个答案:

答案 0 :(得分:3)

您可以使用<li ng-repeat="item in item.comments" ng-include="'tree'" ng-init="depth = depth + 1"></li> 执行此操作。这将在创建新范围时为其分配一个值,您可以通过引用旧范围中的值并将其递增来实现。

plnkr demo

Validation
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