Angularjs 首次注射不'；不实例化

第一次调用时，

authenticated

属性为

false

，即使凭证也正常。如果我用相同的凭证再次登录，就可以了

无论如何，我不确定我下面的工厂在angularjs是否正确。你能给我一些建议吗

工厂：

控制器：

---

authenticator.trunt

中的

this.authenticated

将在来自

$resource

的异步调用完成之前返回

在从工厂返回之前，以及在控制器中接收之前，您需要等待承诺得到解决

像这样的事情很可能会奏效：

工厂：

authenticator.attempt = function(email, password){

  var current = this;

  $resource("/service/authentication/:id", null, {'update' : { method: 'PUT'}})
    .save({'email' : email,'password': password},
      function(response){
          current.authenticated = sessionStorage.authenticated = true;
          current.userinfo = response.user;
          current.authenticated = true;
      },
      function(response){
          current.authenticated = false;
      }
    ).$promise.then(function () {
      return current.authenticated;
    });
};

控制器：

$scope.login = function() {

  var email = $sanitize($scope.email);
  var password = $sanitize($scope.password);

  authenticator.attempt(email, password).then(function(isAuthenticated) {

    if (isAuthenticated) $location.path('/dashboard');
    else alert.add("danger", "Login fail.");

  });
};

---

非常感谢，这很有帮助。

authenticator.attempt = function(email, password){

  var current = this;

  $resource("/service/authentication/:id", null, {'update' : { method: 'PUT'}})
    .save({'email' : email,'password': password},
      function(response){
          current.authenticated = sessionStorage.authenticated = true;
          current.userinfo = response.user;
          current.authenticated = true;
      },
      function(response){
          current.authenticated = false;
      }
    ).$promise.then(function () {
      return current.authenticated;
    });
};

$scope.login = function() {

  var email = $sanitize($scope.email);
  var password = $sanitize($scope.password);

  authenticator.attempt(email, password).then(function(isAuthenticated) {

    if (isAuthenticated) $location.path('/dashboard');
    else alert.add("danger", "Login fail.");

  });
};