Tips for transferring information from a controller to a directive in AngularJS using AJAX requests

I want to pass data to a directive once the call is successful. Below is the ajax call from my controller:

$scope.items ={
                avatar: ""
 };
$scope.addComment = function(segment) {
    commentFactory.saveComment($scope.form.comment,segment,0,0)
    .success(function(data){
        $scope.items.avatar = data.avatar;
    })
    .error(function(data){
       console.log(data); 
    });

    // Reset the form after values have been consumed.
    $scope.form.comment = "";
};

Here are two directives - the first one used for submitting the form and making the ajax request, and the second one used for updating content on the client side. I need the second directive to load content from the ajax call. The issue now is that the directive does not wait for the ajax call to finish.

.directive("addcomment", function(){
    return {
        restrict: "E",
        template: '<input type="submit" addcomments class="btn btn-default pull-right" value="Send" />'
    };
})

.directive("addcomments", function($compile){
    return {
        link: function (scope, element, attrs) {
            var html = '<div>'+scope.items.avatar+'</div>';

            element.bind("click", function(){
                angular.element(document.getElementById('space-for-new-comment'))
                            .append($compile(html)(scope));
            })  
        }
    };
});

Does anyone have a solution for this?

Answer №1

Here is an alternative approach to writing this code snippet: If you want to include comments in your HTML:

<div class="smartdivforcomments">
    <div ng-repeat="comment in newComments">
        {{comment.avatar}}
    </div>
</div>

In the controller: $scope.newComments = []; Function for adding comments:

commentFactory.saveComment($scope.form.comment,segment,0,0)
.success(function(data){
    $scope.newComments.push({avatar : data.avatar});
})
.error(function(data){
   console.log(data); 
});

In response to your question about binding click events that are not Angular-related, you will need to use scope.apply to ensure correct updating of your view.

Answer №2

Implement a watch functionality within the addcomments directive to monitor the availability of the controller scope variable items.avatar.

.directive("addcomments", function($compile){
  return {
    link: function (scope, element, attrs) {

      scope.$watch('items.avatar', function(newVal, oldVal) {
        // Check if the avatar is loaded
        if(scope.items.avatar === undefined) return;

        // If loaded, proceed with necessary actions
        var html = '<div>'+scope.items.avatar+'</div>';

        element.bind("click", function() {
          angular.element(document.getElementById('space-for-new-comment'))
          .append($compile(html)(scope));
        });          
      });
    }
  };
});

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