Question

我是AngularJS的新手，并且一直试图从工厂获得JSON几天。我一直得到同样的错误，但没有给我太多信息：

TypeError: Cannot read property '1' of null

我的模块：

var app = angular.module('app', ['ngRoute']);

这是我的控制器：

app.controller('homePageController', function ($scope, projectsFactory) {
    $scope.projects = projectsFactory.getList();
});

这是我的工厂：

app.factory('projectsFactory', function($http, $q) {
return {
    getList: function() {
        var deferred = $q.defer();
        $http.get('Resources/JSON/projects.json').success(function(data){
            deferred.resolve(data);
        }).error(function(){
            deferred.reject();
        });
        return deferred.promise;
    },
};
});

以下是部分页面：

<ul ng-controller="homePageController">
<li ng-repeat="project in projects">
    {{projects.name}}
</li>
</ul>

这是JSON本身：

[
{
    "Id": 1,
    "name": "Colombo Law",
    "snippet": "Colombo Law snippet"
},
{
    "Id": 2,
    "name": "Lunch?",
    "snippet": "What for lunch snippet"
}
]

以下是我收到的完整错误消息：

TypeError: Cannot read property '1' of null
at $get (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js:6839:28)
at link (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular-route.js:907:26)
at nodeLinkFn (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js:6271:13)
at compositeLinkFn (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js:5682:15)
at publicLinkFn (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js:5587:30)
at boundTranscludeFn (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js:5701:21)
at controllersBoundTransclude (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js:6292:18)
at update (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular-route.js:865:25)
at Scope.$get.Scope.$broadcast (https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.js:12329:28)
at https://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular-route.js:556:26 <div ng-view="" class="ng-scope">

任何帮助将不胜感激！

Answer 1

较新版本的角度不会自动解析承诺。您的项目工厂正在返回承诺而不是实际列表，并且ng-repeat将不会对承诺起作用。

我相信您需要做的是将promise的结果分配给您的范围变量，如下所示：

app.controller('homePageController', function ($scope, projectsFactory) {
  projectsFactory.getList().then(function(projects) {
    $scope.projects = projects;
  });
});

工厂的JSON没有加载

1 个答案: