Troubleshooting: Issue with Displaying $Http JSON Response in AngularJS View

Struggling to retrieve JSON data from an API and display it in a view using AngularJS. Although I am able to fetch the data correctly, I am facing difficulties in showing it in the view. Whenever I try to access the object's data, I constantly receive undefined as the result.

Here is the approach I am taking...

API Service:

myApp.service('apiService', ['$http', function($http)
{
    var api = "http://domain.xpto/api/";

    var self = this;
    this.result;

    var apiService =
    {
        getSection: function(id)
        {
            var url = api + "section/" + id;

            return $http.get(url);
        }
    }

    return apiService;
}]);

Controller:

myApp.controller('mainController', ['$scope', '$routeParams', 'apiService', function($scope, $routeParams, apiService)
{
    apiService.getSection(1).then(function(response)
    {
        $scope.$applyAsync(function ()
        {
            var data = response.data; //JSON data retrieved successfully
            var section = data.section; //Why is this undefined?
            var images = data.images; //Still undefined

            $scope.title = section.title; //Remains undefined         
        });
    });

}]);

JSON Result: https://i.sstatic.net/CtKKB.jpg

UPDATE: Modified my apiService based on suggestions from @Salih and @elclanrs.

What could be causing the inability to access the nested objects of the JSON (e.g., data.section.title)?

UPDATE #2: Managed to finally access the data by adding an extra data level to reach the section object in my JSON array (response.data.data.section). Honestly, I am still puzzled about why this was necessary. Accessing the API with jQuery was much simpler...

Answer №1

Update: Check out this plunker I created to assist you! http://embed.plnkr.co/Yiz9TvVR4Wcf3dLKz0H9/

If it were me, I would recommend using the service function to update your own service value. You've already initialized this.result, so simply update its value.

Your Service:

myApp.service('apiService', ['$http', function($http)
{
    var api = "http://domain.xpto/api/";

    var self = this;
    this.result = {};

    this.getSection = function(id){
        var url = api + "section/" + id;

        $http.get(url).then(function(res){
            self.result = res;
        });
    }
}]);

I advise against using a Promise in this scenario. You can easily access the Service's variables from both the Controller and View.

Your controller:

myApp.controller('mainController', ['$scope', '$routeParams', 'apiService', 
function($scope, $routeParams, apiService)
{
    $scope.apiSer = apiService;

    $scope.apiSer.getSection(1);

}]);

In your View:

<pre>{{ apiSer.result }}</pre>

With these changes, you'll observe real-time updates to your parameter.

Answer №2

For your getSection method, simply include the line below:

sendRequest($http.get(url));

Answer №3

If you're having trouble accessing the nested values in your JSON, consider utilizing the angular.forEach method. You can refer to this example for more insights: Accessing nested JSON with AngularJS

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