Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

Access index of the parent ng-repeat from child ng-repeat

People also ask

How do I get the index of an element in NG-repeat?

Note: The $index variable is used to get the Index of the Row created by ng-repeat directive. Each row of the HTML Table consists of a Button which has been assigned ng-click directive. The $index variable is passed as parameter to the GetRowIndex function.

How does ng-repeat work?

The ng-repeat directive repeats a set of HTML, a given number of times. The set of HTML will be repeated once per item in a collection. The collection must be an array or an object. Note: Each instance of the repetition is given its own scope, which consist of the current item.

Why we use NG-repeat in Angular?

Example# ng-repeat is a built in directive in Angular which lets you iterate an array or an object and gives you the ability to repeat an element once for each item in the collection. To repeat multiple DOM elements by defining a start and an end point you can use the ng-repeat-start and ng-repeat-end directives.


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>

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.


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

You can simply use use $parent.$index .where parent will represent object of parent repeating object .