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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.
The ng-repeat looks like this:
ng-repeat="(key, value) in value"
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.
Some examples of things I want to do is:
ng-show="isArray(parent)"
ng-click="delete(parent, $index)"
(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 >.>;;)
EDIT: Basically I want to know if there is any convenient meta data in an ng-repeat context that I'm missing.
EDIT: 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>
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.
956
ng-repeat creates a new scope for each element.ng-include also creates a new scope.
When you use ng-include together with ng-repeat, there are 2 scopes created for each element:
ng-repeat for current element. This scope holds the current element in the iteration.ng-include which inherits from ng-repeat's created scope. The $parent property of current scope allows you to access its parent scope.
Essentially, scope created by ng-include is empty, when you access value and key in your node.html, it actually access the inherited values from parent scope created by ng-repeat.
In your node.html, accessing {{value}} is actually the same as {{$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}}
This DEMO will clear things up:
<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.$parent.value)}}
</div>
<ul ng-if="isObject(value)"> //only iterate over object to avoid problems when iterating a string
<li ng-repeat="(key,value) in value" ng-include="'node.html'"></li>
</ul>
</script>
If you need to simplify the way to access the parent, you could try initializing the parent using onload of ng-include. Like this:
In your top level, there is no ng-if => only 2 level deep
<ul>
<li ng-repeat="(key,value) in json"
ng-include="'node.html'" onload="parent=$parent.$parent"></li>
</ul>
In your sub levels, there is ng-if => 3 levels deep:
<ul ng-if="isObject(value)">
<li ng-repeat="(key,value) in value"
ng-include="'node.html'" onload="parent=$parent.$parent.$parent"></li>
</ul>
Inside the template, you could access the parent using parent, grandparent using parent.parent and so on.
DEMO
79
I would stay away from Angular's $parent and all the $scope creation and inheritance madness. What you need is to keep a reference to the parent object, not finding how many scopes are in-between ng-include's and ng-repeat's and juggling with $parent.$parent. My suggestion is to explicitly save references to the values you are interested in, just implement it yourself with custom logic. For example, if you want to expose a value from the parent ng-repeat to the child ng-repeat
<!-- Explictly save the value into the parent var -->
<div ng-init="parent = value">
<!-- Save parent reference and
update the parent var to point to the new value -->
<div ng-repeat="(k,value) in value"
ng-init="value._parent = parent; parent = value;">
<div ng-repeat="(k,value) in value"
ng-init="value._parent = parent">
<button ng-click="doSomething(value)"></button>
</div>
</div>
</div>
Then in your javascript code you can access all parents recursively
function doSomething(value){
parent1 = value._parent;
parent2 = parent1._parent;
}
Same code with ng-include
<div ng-init="parent = value">
<div ng-repeat="(key,value) in value"
ng-init="value._parent = parent; parent = value;"
ng-include="'node.html'">
</div>
</div>
<script type="text/ng-template" id="node.html">
<div ng-if="!isLeaf(value)"
ng-repeat="(key,value) in value"
ng-init="value._parent = parent; parent = value;"
ng-include="'node.html'">
<button ng-if="isLeaf(value)" ng-click="doSomething(value)"></button>
</script>
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