在NG-重复递归迭代时如何获得内部的父元素NG-包括 [英] How to get parent element inside ng-include when iterating in ng-repeat recursively
问题描述
我做了一个递归NG重复元素，并试图操纵的东西已经变成了噩梦，因为我没有提到我遍历父。
I made a recursive ng-repeat element, and trying to manipulate things has turned into a nightmare, because I don't have reference to the parent I'm iterating over.
NG的重复看起来是这样的：
The ng-repeat looks like this:
ng-repeat="(key, value) in value"
请记住这是递归的，所以在价值的每个值成为新的价值，所以我不能只用in值从NG-重复。我想做这样的事情检查，如果父母是一个数组，而$父是一些奇怪的事情，而不是当前迭代值的父元素。
Remember It's recursive, so each value in value becomes the new value, so I can't just use the "in" value from ng-repeat. I want to do such things as checking if the parent is an array, but $parent is some weird thing, not the parent element of the current iteration value.
事情我想要做的一些例子是：
Some examples of things I want to do is:
ng-show="isArray(parent)"
ng-click="delete(parent, $index)"
（为我在做什么作为工作围绕一个例子，我有一个___ISARRAYELEMENT___属性添加到我的每一个数组元素，只是知道它是在一个数组>> ;;）
(as an example of what I'm doing as a work around, I've had to add an ___ISARRAYELEMENT___ property to each of my array elements, just to know that it's in an array >.>;;)
编辑：基本上我想知道是否有在NG-重复内容的任何方便的元数据，我很想念
Basically I want to know if there is any convenient meta data in an ng-repeat context that I'm missing.
编辑：确定这里是它的全部的HTML：
Ok here is the html in it's entirety:
<html ng-app>
<head>
<title>JSON CRUD</title>
<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.min.js"></script>
<script src="angularjsoncrud.js"></script>
<script type="text/ng-template" id="node.html">
<button ng-click="minimized = !minimized" ng-show="!isLeaf(value)" ng-init="minimized=false" ng-class="{'glyphicon glyphicon-plus': minimized, 'glyphicon glyphicon-minus': !minimized}">-</button>
<input ng-model="value.___KEY___" ng-if="!isArrayElement(value)" />
<input ng-if="isLeaf(value)" ng-model="value.___VALUE___" />
<ul ng-if="!isLeaf(value)" ng-show="!minimized">
<li ng-repeat="(key,value) in value" ng-if="key != '___KEY___' && key != '___ISARRAY___'" ng-include="'node.html'"></li>
<button type="button" ng-if="isArray(value)" ng-click="addToArray(value)">Add Element</button>
</ul>
</script>
</head>
<body ng-app="Application" ng-controller="jsoncrudctrl">
<ul>
<li ng-repeat="(key,value) in json" ng-include="'node.html'"></li>
</ul>
<pre>{{stringify(json)}}</pre>
</body>
</html>
有一件事我想要做的就是替换IsArray的（父）isArrayElement（值），因为isArrayElement依靠我添加到阵列中，我将preFER到不能添加元数据。
One thing I would like to do is replace isArrayElement(value) with isArray(parent), because isArrayElement relies on meta data I added to the array, which I would prefer to not have to add.
推荐答案
NG-重复创建每个元素的新范围。结果 NG-包括也创造了一个新的范围。
ng-repeat creates a new scope for each element.
ng-include also creates a new scope.
当您使用 NG-包括与一起NG-重复，也有每个元素创建2范围：
When you use ng-include together with ng-repeat, there are 2 scopes created for each element:
- 按
创建范围NG-重复当前元素。这个范围包含在迭代的当前元素。 - 儿童范围按
创建NG-包括其中继承从NG-重复的创建范围。
- Scope created by
ng-repeatfor current element. This scope holds the current element in the iteration. - Child scope created by
ng-includewhich inherits fromng-repeat's created scope.
的 $父当前范围的属性，您可以访问它的父范围。
The $parent property of current scope allows you to access its parent scope.
从本质上讲，范围由创建NG-包括是空的，当你访问值和从父在 node.html ，它实际上访问的的继承的值的>通过 NG-重复创建范围。
Essentially, scope created by ng-include is empty, when you access value and key in your node.html, it actually access the inherited values from parent scope created by ng-repeat.
在您node.html，访问 {{}值} 实际上是一样的 {{$ parent.value}} 。因此，如果你需要访问当前元素的父，你必须做的一步通过访问 {{$父。$ parent.value}}
In your node.html, accessing {{value}} is actually the same as {{$parent.value}}. Therefore if you need to access the parent of the current element, you have to do one step further by accessing {{$parent.$parent.value}}
这演示情况搞清楚：
<script type="text/ng-template" id="node.html">
<div>
Current: key = {{key}}, value = {{value}}
</div>
<div>
Current (using $parent): key = {{$parent.key}}, value = {{$parent.value}}
</div>
<div>
Parent: key = {{$parent.$parent.key}}, value = {{$parent.$parent.value}}, isArray: {{isArray($parent.$parent.value)}}
</div>
<ul ng-if="isObject(value)"> //only iterate over object to avoid problems when iterating a string
<li ng-repeat="(key,value) in value" ng-include="'node.html'"></li>
</ul>
</script>
如果您需要简化的方式来访问父，你可以尝试使用的。像这样的：的onload 初始化父NG-包括
If you need to simplify the way to access the parent, you could try initializing the parent using onload of ng-include. Like this:
在您的顶层，没有 NG-如果 =>只有2级深
In your top level, there is no ng-if => only 2 level deep
<ul>
<li ng-repeat="(key,value) in json"
ng-include="'node.html'" onload="parent=$parent.$parent"></li>
</ul>
在你的分层次，有 NG-如果 =>深3个级别：
In your sub levels, there is ng-if => 3 levels deep:
<ul ng-if="isObject(value)">
<li ng-repeat="(key,value) in value"
ng-include="'node.html'" onload="parent=$parent.$parent.$parent"></li>
</ul>
在模板中，您可以访问使用父父，使用 parent.parent 等祖父母。
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