How to access a controller function within a recursive directive template in Angular version 1.3?

In my parent directive, I am able to access controller functions using the $parent operator. However, this method does not work in recursive child directives. Here is a shortened example of the issue:

// Sample controller code (using controllerAs):---

var View2Ctrl = function(){

    // The function I'm trying to access:
    this.getNumber = function(){
        return 5;
    }
.
.
.
angular.controller('View2Ctrl',............

// 'comments' directive template:--

<li>
    <!-- Trying to access the function here: -->
    <!-- This line works only once here and doesn't load in recursive child directives below:  -->
    <strong> Number: </strong> {{ $parent.View2Ctrl.getNumber() }}

    <!-- This line gets replaced with a recursive child directive again -->
    <span class="comments-placeholder" ></span>     
</li>

// 'comments' directive.js:---

var comments = function($compile){
    return {
        templateUrl : 'modules/comments/commentsDirective.html',
        restrict:'E',
        scope:{
            collection: '='
        },
        link: function(scope, element, attrs){
            if(scope.collection.data.replies){
                var elementResult = angular.element(element[0].getElementsByClassName('comments-placeholder'));

                elementResult.replaceWith($compile('<ul ng-repeat="comment in collection.data.replies.data.children><comments collection="comment"></comments></ul>')(scope));
            }
        }
    };
};

Answer №1

To access the parent controller's this, you can use the require method.

var posts = function($compile){
  return {
    ...
    require: '^ngController',
    link: function(scope, element, attrs, ctrl){
       $scope.info = ctrl.getInfo();
    }
  };
};

However, it is recommended to implement a service as a model to store data for both controllers and directives.

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