承诺不会在AngularJs中返回推迟

Question

函数正在执行，但未返回要延迟的userType值。 因此导航到默认页面。

我有两种登录类型，即经理admin，基于UI页面的响应，应导航至相应页面，这是我的要求。 我什至从UI到角度控制器都得到了响应，但在承诺范围内，它没有获取这些值。 任何帮助，不胜感激

StudentRepository.js

angular.module('student').service('StudentRepository',['$http','$q','$rootScope', function(http, $q,rootScope){
    var user=[];
    this.loginCheck = function(id,password,userType){
        var testVar  = id + "," +password+","+userType;
        var defer = $q.defer(); 
        var studentPromise =  http.put('/Stud/login/',testVar);
        //in testVar also am getting all these values
        studentPromise.then(function(result){ 
         //within this function in result.data am getting null
            user = result.data;
            alert("the result is"+result.data);
            defer.resolve(user);
        });
        return defer.promise;
    };
    }]);

logon.js

angular.module('student').controller('LogonController', ['$http','$scope',
   'StudentRepository', '$stateParams', '$state','$rootScope',
    function(http,scope,StudentRepository,stateParams,state,rootScope){

    alert("we r in logon controller ");
    scope.loginCheck  = function(){
    //enter the input values,after submit

    alert("userType"+ scope.user.userType);
        StudentRepository.loginCheck(scope.user.id,scope.user.password,scope.user.userType)
    .then(function (response){
    rootScope.role=response;
    alert(" logon controller"+response);

    if(response == "manager")
    {
        scope.manager=response;
        alert("The user is manager"+" .... "+scope.manager);
        state.go("home");

    }
    else if(response.data == "admin")
    {
        scope.admin=response.data;
        alert("The user is admin"+" ..... "+scope.admin);   
        state.go("home");
    }

    else
    {
        alert(" ID/Password is Invalid...");
        state.go("landingPage");
    }

    });
};
}
]);

Answer 1

我认为您可以更简单地完成此操作，因为$http.method已经返回了Promise。

$ http.put文档

你可以试试这个：

this.loginCheck = function(id,password,userType){
  var testVar  = id + "," +password+","+userType;
  return http.put('/stud/login/',testVar);    
};

如果您想处理服务中的成功和错误，也可以这样做：

 this.loginCheck = function(id,password,userType){
  var testVar  = id + "," +password+","+userType;
  return http.put('/stud/login/',testVar).then(function (response){
     return response // or response.data
 }
  , function (error){
     return error;
  });    
 };

我认为它应该与旅游控制器一起使用