Angularjs 错误：null 不是对象(评估 'a.$current.locals[l]')

Question

我有一个Angular Project设置，当用户转到/cloud并且未登录时（isLoggedIn()返回失败），它将重定向到/login。然后，如果它们登录并转到/login，它将它们重定向到/cloud。

但是，当我单击"注销"按钮清除本地存储时，我会收到以下错误（一切仍然有效）：

错误：null不是对象（评估'a。$ current.locals [l]'）

根据我的日志，它的注销控制器似乎正在onEnter上发生。

我是Angular的新手，因此将不胜感激。

var routerApp = angular.module('myapp', ['ui.router'])
    //config for state changes
    .factory('Auth', function($http, $state, $q) {
        var factory = { isLoggedIn: isLoggedIn };
        return factory;
        function isLoggedIn(token) {
            return $http.post('/auth/session', {token:token});
        }
    })
    .config(function($stateProvider, $urlRouterProvider, $locationProvider) {
        $locationProvider.html5Mode(true);
        $urlRouterProvider.otherwise('/cloud');
        var authenticated = ['$q', 'Auth', '$rootScope', function ($q, Auth, $rootScope) { 
            var deferred = $q.defer();
            if (typeof window.localStorage['authtoken'] === 'undefined') {
                var authtoken = undefined;
            } else {
                var authtoken = window.localStorage['authtoken'];
            }
            Auth.isLoggedIn(authtoken).then(function() {
                deferred.resolve();
            }, function() {
                deferred.reject();
            });
            return deferred.promise;
        }];
        var authGuest = ['$q', 'Auth', '$rootScope', function ($q, Auth, $rootScope) { 
            var deferred = $q.defer();
            if (typeof window.localStorage['authtoken'] === 'undefined') {
                var authtoken = undefined;
            } else {
                var authtoken = window.localStorage['authtoken'];
            }
            Auth.isLoggedIn(authtoken).then(function() {
                deferred.reject();
            }, function() {
                deferred.resolve();
            });
            return deferred.promise;
        }];
        $stateProvider
            .state('login', {
                url: '/login',
                templateUrl: 'pages/templates/login.html',
                resolve: { authenticated: authGuest }
            })
            .state('logout', { url: '/logout', onEnter: function($state) { localStorage.clear(); $state.go('login'); } })
            .state('cloud', {
                url: '/cloud',
                templateUrl: 'pages/templates/cloud.html',
                resolve: { authenticated: authenticated }
            })
    })
    .run(function ($rootScope, $state) {
        $rootScope.$on('$stateChangeError', function (event, from, error) {
            if(from.name == "login") {
                $state.go('cloud');
            } else {
                $state.go('login');
            }
        });
    });

Answer 1

问题似乎在这里：

    var authenticated = ['$q', 'Auth', '$rootScope', function ($q, Auth, $rootScope) { 
        var deferred = $q.defer();
        if (typeof window.localStorage['authtoken'] === 'undefined') {
            var authtoken = undefined;
        } else {
            var authtoken = window.localStorage['authtoken'];
        }
        Auth.isLoggedIn(authtoken).then(function() {
            deferred.resolve();
        }, function() {
            deferred.reject();
        });
        return deferred.promise;
    }];

此功能只能在 Configuration 上运行一次。诺言一旦解决，无论LocalStorage如何，都将继续解决相同的值。每次你

resolve: { authenticated: authenticated }

您将在 Configuration 步骤中恢复authenticated值。

相反，添加一个控制器以将函数定义为每种类型的请求状态

  .controller('AuthenticationController', function($scope, '$q', Auth, '$rootScope') {
        $scope.authenticated = function () { 
            var deferred = $q.defer();
            if (typeof window.localStorage['authtoken'] === 'undefined') {
                var authtoken = undefined;
            } else {
                var authtoken = window.localStorage['authtoken'];
            }
            Auth.isLoggedIn(authtoken).then(function() {
                deferred.resolve();
            }, function() {
                deferred.reject();
            });
            return deferred.promise;
        };
        $scope.authGuest = function ($scope, '$q', Auth, '$rootScope') { 
            ....
            return deferred.promise;
        };
    });

然后，在您的路由配置中：

        .state('login', {
            url: '/login',
            templateUrl: 'pages/templates/login.html',
            controller: 'AuthenticationController'
            resolve: { authenticated: $scope.authGuest() }
        })
        .state('cloud', {
            url: '/cloud',
            templateUrl: 'pages/templates/cloud.html',
            resolve: { authenticated: $scope.authenticated()}
        })

现在，每次您解决新的诺言。

免责声明：无需使用的工作版本，我为演示目的形成了此代码。应该将其处理为伪代码以朝正确的方向引导。