javascript - 使用 Getter 函数返回未定义的 Angular 服务公开对象

Question

这是代码：

authServ.getUser() 从任何地方返回 {}（一个空对象，对应于这个 var 的声明），即使在我根据这个 [问题][1] 对返回语法进行了修订之后也是如此。

谁能告诉我是什么问题？，我看不出它不应该工作的原因

app.factory('authService', function($http){
    var authServ = {};
    var currentUser = {};
        authServ.authUser = function(){
            return $http.head('/users/me', {withCredentials: true});
        },
        authServ.getUser =  function(){
            return currentUser;
        },
        authServ.setCompany =  function(companyId){
            currentUser.company = companyId;
        }
        authServ.loadCurrentUser = function(){
            $http.get('/users/me', {withCredentials: true}).
            success(function(data, status, headers, config){
                console.log(data);
                currentUser.company = currentUser.company ? currentUser.company : data.main_company;
                currentUser.companies = [];
                for(var i in data.roles){
                    currentUser.companies.push(data.roles[i]['company_name']);
                    if(data.roles[i]['company'] == currentUser.company)
                        currentUser.role = data.roles[i]['role_type'];
                }
                console.log(currentUser);
            }).
            error(function(data, status, headers, config){
                currentUser.role = 'guest';
                currentUser.company = 1;
            });
        }

        return authServ;
});

工作代码：

run(function($rootScope, $location, $http, authService){
$rootScope.$on("$routeChangeError", function(event, current, previous, rejection){
    if(rejection.status == 401)
        $location.path('/login');
})
authService.loadCurrentUser().then(function(){
    console.log(authService.getUser());
});


});
app.factory('authService', function ($http) {
    authServ = {};
    that = this;
    that.currentUser = {};
    authServ.authUser = function () {
        return $http.head('/users/me', {
            withCredentials: true
        });
    },
    authServ.getUser = function () {
        return that.currentUser;
    },
    authServ.setCompany = function (companyId) {
        that.currentUser.company = companyId;
    },
    authServ.loadCurrentUser = function () {
        return $http.get('/users/me', {
            withCredentials: true
        }).
        success(function (data, status, headers, config) {
            console.log(data);
            that.currentUser.company = that.currentUser.company ? that.currentUser.company : data.main_company;
            that.currentUser.companies = [];
            for (var i in data.roles) {
                that.currentUser.companies.push(data.roles[i]['company_name']);
                if (data.roles[i]['company'] == that.currentUser.company) that.currentUser.role = data.roles[i]['role_type'];
            }
            console.log(that.currentUser);
        }).
        error(function (data, status, headers, config) {
            that.currentUser.role = 'guest';
            that.currentUser.company = 1;
        });
    }
    return authServ;
});

小提琴：http: //jsfiddle.net/V9Ex6/1/

Answer 1

试试这个，请注意我还没有测试过:)

app.factory('authService', function($http){
    return {
        authUser: function(){
            return $http.head('/users/me', {withCredentials: true});
        },
        getUser:  function(){
            return currentUser;
        },
        setCompany:  function(companyId){
            currentUser.company = companyId;
        },
        loadCurrentUser: function(){
            $http.get('/users/me', {withCredentials: true}).
            success(function(data, status, headers, config){
                console.log(data);
                currentUser.company = currentUser.company ? currentUser.company : data.main_company;
                currentUser.companies = [];
                for(var i in data.roles){
                    currentUser.companies.push(data.roles[i]['company_name']);
                    if(data.roles[i]['company'] == currentUser.company)
                        currentUser.role = data.roles[i]['role_type'];
                }
                console.log(currentUser);
            }).
            error(function(data, status, headers, config){
                currentUser.role = 'guest';
                currentUser.company = 1;
            });
        }
     }
});

Answer 2

关闭问题。尝试

app.factory('authService', function($http){
    var authServ = {};
    that = this; //that captures the current closure
    this.currentUser = {};
    authServ.getUser =  function(){
        return that.currentUser;
    },

并更改loadCurrentUser为使用 访问变量that.currentUser。

编辑：

authService.loadCurrentUser();
console.log(authService.getUser());

loadCurrentUser由于异步加载用户，因此不能保证打印出用户。您应该更改loadCurrentUser为采用回调函数以获取用户值。

希望能帮助到你。