AngularJS Factory 中的 THIS 范围

Question

我很困惑因为'this' 属性.

“delete this.user;”在 AuthenticationFactory 中是什么意思。我认为函数“check”是一种方法，因此它将与“auth”对象绑定。但是，'auth' 对象中没有'user' 属性。能解释一下吗？

此外，在“UserAuthFactory”中（delete AuthenticationFactory.user、delete AuthenticationFactory.userRole）

我不知道什么是“user”和“userRole”属性。 AuthenticationFactory.

中没有此类属性

这是我来自 http://thejackalofjavascript.com/architecting-a-restful-node-js-app/

的代码

myApp.factory('AuthenticationFactory', function($window) {
  var auth = {
    isLogged: false,
    check: function() {
      if ($window.sessionStorage.token && $window.sessionStorage.user) {
        this.isLogged = true;
      } else {
        this.isLogged = false;
        delete this.user;
      }
    }
  }

  return auth;
});

myApp.factory('UserAuthFactory', function($window, $location, $http, AuthenticationFactory) {
  return {
    login: function(username, password) {
      return $http.post('http://localhost:3000/login', {
        username: username,
        password: password
      });
    },
    logout: function() {

      if (AuthenticationFactory.isLogged) {

        AuthenticationFactory.isLogged = false;
        delete AuthenticationFactory.user;
        delete AuthenticationFactory.userRole;

        delete $window.sessionStorage.token;
        delete $window.sessionStorage.user;
        delete $window.sessionStorage.userRole;

        $location.path("/login");
      }

    }
  }
});

Answer 1

如果再往下看，控制器代码：

$scope.login = function() {

  var username = $scope.user.username,
    password = $scope.user.password;

  if (username !== undefined && password !== undefined) {
    UserAuthFactory.login(username, password).success(function(data) {

      AuthenticationFactory.isLogged = true;
      AuthenticationFactory.user = data.user.username;
      AuthenticationFactory.userRole = data.user.role;

      $window.sessionStorage.token = data.token;
      $window.sessionStorage.user = data.user.username; // to fetch the user details on refresh
      $window.sessionStorage.userRole = data.user.role; // to fetch the user details on refresh

      $location.path("/");

    }).error(function(status) {
      alert('Oops something went wrong!');
    });
  } else {
    alert('Invalid credentials');
  }

};

成功登录后，控制器将属性 user 和 userRole 添加到 AuthenticationFactory。

AngularJS Factory 中的 THIS 范围

AngularJS scope of THIS in Factory

javascript

angularjs

this

factory