The Issue of Angular Scope Variables Not Displaying in Print

I have defined an angular factory and controller with the following code:

angular.module('myApp', ['ui.router', 'ngResource'])
.factory('Widget', ['$http', function WidgetFactory($http) {
    return {
        all: function() {
            return $http({method: "GET", url: "/widgets"});
        }
    };
}])
.controller('StoreCtrl', ['$scope', 'Widget', function($scope, Widget) {
    $scope.widgets = Widget.all();
}]);

Within my front-end HTML, I am using the following structure:

<div ng-controller="StoreCtrl">
    <li ng-repeat="widget in widgets">
        {{ widget.price }}
        {{ widget.name }}
    </li>
</div>

Despite this setup, nothing is showing up for {{ widget.price }} or any other fields.
What could be causing this issue?

javascriptangularjsajaxangularjs-serviceangular-controller

Answer №1

Your promise resolution may not be in line with the framework's expectations. Visit the $q documentation for a better understanding of promises. It is important to correctly set the view model value (scope) to the returned value from the response object, which includes information such as...

  • data – {string|Object} – The response body transformed using
  • transform functions. status – {number} – HTTP status code of the
  • response. headers – {function([headerName])} – Header getter function.
  • config – {Object} – The configuration object used for the request.
  • statusText – {string} – HTTP status text of the response.

Please note the following example...

Widget.all().then(function (response) {
    $scope.widgets = response.data;
});

In addition, consider that naming your factory function like WidgetFactory is unnecessary; an anonymous function suffices. You can also utilize the $http shortcut method get as shown below...

.factory('Widget', ['$http', function($http) {
    return {
        all: function() {
            return $http.get('/widgets');
        }
    };
}]);

Answer №2

When using $http in AngularJS, make sure to handle promises correctly. Once the promise returns a response, assign the data to $scope.widgets. Here's an example implementation within the controller:

Widget.all().then(function (data) {
    $scope.widgets = data;
});

Answer №3

Before proceeding, verify that you have an Array object stored in

$scope.widgets;

within your controller. You can add this line of code to your controller 

console.log($scope.widgets);

to check if the data is present or not.

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