javascript - AngularJS Controller 工厂剩余 JSON

Question

我正在尝试从多个 Controller 调用工厂。该工厂获取 JSON 数据。当我尝试直接从 Controller 调用时，我可以成功。现在我刚刚添加了一个工厂，控制台中没有错误，但屏幕上也没有任何内容。这是代码:

html 模板:

<!-- Schools -->
<div class="row">
    <h3 class="text-center">Schools and Associations</h3>
    <ul class="gallery gallery1" ng-controller="SchoolsCtrl">
        <li ng-repeat="school in schools" class="card">
            <a ng-href="{{school.url}}" target="_blank">
                <img ng-src="{{school.thumbUrl}}" class="img-responsive">
                <p class="text-center">{{school.name}}</p>
                <p class="text-center">{{school.time}}</p>
            </a>
        </li>
    </ul>
</div>

Controller .js:

var mainApp = angular.module('mainApp', ['bootstrapLightbox', 'ngAnimate']);

mainApp.controller('CompaniesCtrl', function($scope, GalleryService) {
$scope.companies = GalleryService.getObjects('app/common/companies.json');
});

mainApp.controller('WorksCtrl', function($scope, GalleryService) {
$scope.works = GalleryService.getObjects('app/common/freelance-projects.json');
});

mainApp.controller('SchoolsCtrl', function ($scope, GalleryService) {
$scope.schools = GalleryService.getObjects("app/common/schools.json");
});

service.js:

mainApp.factory('GalleryService', function ($http) {
    return {
        getObjects: function (jsonUrl) {
            $http.get(jsonUrl)
                .success(function (data) {
                    return data; 
                })
                .error(function (data, status, error, config) {
                    return [{heading:"Error", description: "Could not load json data"}];
                });
        }
    }
});

Answer 1

为了从工厂函数 getObjects 检索数据，您应该从 getObjects 函数返回一个带有 .then 函数的 Promise 到链式 Promise。在 Controller 内部，您可以使用 .then 函数回调调用 getObjects 来接收响应。

工厂

mainApp.factory('GalleryService', function ($http) {
    return {
        getObjects: function (jsonUrl) {
            return $http.get(jsonUrl)
                .then(function (resp) {
                    return resp.data; 
                }, function (res) {
                    return [{heading:"Error", description: "Could not load json data"}];
                });
        }
    }
});

Controller

var mainApp = angular.module('mainApp', ['bootstrapLightbox', 'ngAnimate']);

mainApp.controller('CompaniesCtrl', function($scope, GalleryService) {
  GalleryService.getObjects('app/common/companies.json').then(function(data){
    $scope.companies = data;
  });
});