I want to use the index of the parent list (foos) as an argument to a function call in the child list (foos.bars).
I found a post where someone recommends using $par
You can simply use use $parent.$index .where parent will represent object of parent repeating object .
Take a look at my answer to a similar question.
By aliasing $index
we do not have to write crazy stuff like $parent.$parent.$index
.
Way more elegant solution whan $parent.$index
is using ng-init:
<ul ng-repeat="section in sections" ng-init="sectionIndex = $index">
<li class="section_title {{section.active}}" >
{{section.name}}
</li>
<ul>
<li class="tutorial_title {{tutorial.active}}" ng-click="loadFromMenu(sectionIndex)" ng-repeat="tutorial in section.tutorials">
{{tutorial.name}}
</li>
</ul>
</ul>
Plunker: http://plnkr.co/edit/knwGEnOsAWLhLieKVItS?p=info
You can also get control of grand parent index by the following code
$parent.$parent.$index
My example code was correct and the issue was something else in my actual code. Still, I know it was difficult to find examples of this so I'm answering it in case someone else is looking.
<div ng-repeat="f in foos">
<div>
<div ng-repeat="b in foos.bars">
<a ng-click="addSomething($parent.$index)">Add Something</a>
</div>
</div>
</div>
$parent doesn't work if there are multiple parents. instead of that we can define a parent index variable in init and use it
<div data-ng-init="parentIndex = $index" ng-repeat="f in foos">
<div>
<div data-ng-init="childIndex = $index" ng-repeat="b in foos.bars">
<a ng-click="addSomething(parentIndex)">Add Something</a>
</div>
</div>
</div>
According to ng-repeat docs http://docs.angularjs.org/api/ng.directive:ngRepeat, you can store the key or array index in the variable of your choice. (indexVar, valueVar) in values
so you can write
<div ng-repeat="(fIndex, f) in foos">
<div>
<div ng-repeat="b in foos.bars">
<a ng-click="addSomething(fIndex)">Add Something</a>
</div>
</div>
</div>
One level up is still quite clean with $parent.$index but several parents up, things can get messy.
Note: $index
will continue to be defined at each scope, it is not replaced by fIndex
.