AngularJS service failing to deliver promised result

I am in the process of retrieving data from my database using AngularJS. I have created a service to fetch the data and a controller to display it.

Check out my code snippet:

angular.module('myApp')
    .factory('panelService', ['$http', function ($http) {

        return {
            async: function () {
                return $http.get('/test');  // this returns promise
            }
        };

    }]);


angular.module('myApp')
    .controller('panelCtrl', ['$scope', '$http', function ($scope, $http) {

        var promise = panelService.async()
        promise.then(
            function(payload){
                $scope.user = payload.data;
            }
        )

}]);

Regrettably, this code is not functioning as expected. The data is not being loaded and there is no sign of any JSON object reaching the browser. Interestingly, when I replace panelService.async() with $http.get('/test') in my controller, everything works perfectly. This leads me to believe that there may be an error in my service implementation or it is not being called correctly.

Answer №1

To gain a better understanding of the issue at hand and how to troubleshoot it on your own in the future, let's walk through the necessary steps when something in angularjs is not functioning as expected.

Start by checking the console for any error messages. If you see an error like:

TypeError: Cannot read property 'async' of undefined ...

This should prompt you to question why the parent object of async is undefined. Upon reviewing your code, you may realize that you forgot to inject the panelService into your controller.

Answer №2

To resolve the issue, the recommended approach is to inject the service into the controller in the following manner:

angular.module('myApp')
    .controller('panelCtrl', ['$scope', '$http', 'panelService', function ($scope, $http, panelService) {

        var promise = panelService.retrieveData();
        promise.then(
            function(response){
                $scope.data = response.data;
            }
        )

}]);

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