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Angularjs 从工厂到控制器的角度传递数据_Angularjs_Firebase - Fatal编程技术网

Angularjs 从工厂到控制器的角度传递数据

Angularjs 从工厂到控制器的角度传递数据,angularjs,firebase,Angularjs,Firebase,我试图存储一个授权用户id变量,我可以将其传递给控制器。我知道我试图从工厂对象的闭包内部传递数据时遇到了问题,但我一直在研究如何解决这个问题 这是我的工厂: myApp.factory('Authentication', function($firebase, $firebaseAuth, FIREBASE_URL, $location) { var ref = new Firebase(FIREBASE_URL); var simpleLogin = $firebaseAuth

我试图存储一个授权用户id变量,我可以将其传递给控制器。我知道我试图从工厂对象的闭包内部传递数据时遇到了问题,但我一直在研究如何解决这个问题

这是我的工厂:

myApp.factory('Authentication', function($firebase, 
  $firebaseAuth, FIREBASE_URL, $location) {

  var ref = new Firebase(FIREBASE_URL);
  var simpleLogin = $firebaseAuth(ref);

  var authorized;

  var myObject = {
    login : function() {
    return simpleLogin.$authAnonymously().then(function(authData) {
    authorized = authData.uid;
  console.log("Logged in as:", authData.uid);
}).catch(function(error) {
  console.error("Authentication failed:", error);
});
    },
    auth : authorized
  } //myObject

  return myObject;
});
这是我的控制器:

myApp.controller('MeetingsController', 


function($scope, $firebase, Authentication) {

  var ref = new Firebase('http://i2b2icons.firebaseio.com/');
  var meetings = $firebase(ref);

  $scope.authid = Authentication.auth;

  $scope.meetings = meetings.$asObject();
//  $scope.id = = Authentication.login.id;  
  $scope.addMeeting=function() {
    meetings.$push({
      name: $scope.meetingname,
      date: Firebase.ServerValue.TIMESTAMP
    }).then(function() {
      $scope.meetingname = '';
    });
  } //addmeeting

  $scope.deleteMeeting=function(key) {
    meetings.$remove(key);
  } //deletemeeting

}); //MeetingsController
myApp.controller('RegistrationController', 


function($scope, $firebaseAuth, $location, Authentication) {


  $scope.login = function() {
    Authentication.login();
  } //login


}); //RegistrationController
我只是想让$scope.authid变量从myObject的登录函数中获取AUAuthorized的值

应已通过此控制器登录调用登录方法:

myApp.controller('MeetingsController', 


function($scope, $firebase, Authentication) {

  var ref = new Firebase('http://i2b2icons.firebaseio.com/');
  var meetings = $firebase(ref);

  $scope.authid = Authentication.auth;

  $scope.meetings = meetings.$asObject();
//  $scope.id = = Authentication.login.id;  
  $scope.addMeeting=function() {
    meetings.$push({
      name: $scope.meetingname,
      date: Firebase.ServerValue.TIMESTAMP
    }).then(function() {
      $scope.meetingname = '';
    });
  } //addmeeting

  $scope.deleteMeeting=function(key) {
    meetings.$remove(key);
  } //deletemeeting

}); //MeetingsController
myApp.controller('RegistrationController', 


function($scope, $firebaseAuth, $location, Authentication) {


  $scope.login = function() {
    Authentication.login();
  } //login


}); //RegistrationController

您只是在工厂中设置局部变量
authorized
,它与您试图在控制器中访问的
身份验证.auth
无关(当然,除非您在创建因子时将值设置为它,而这无论如何都不是目的)。而是在工厂中返回预定义对象并从中返回该对象。设置对象引用的属性

myApp.factory('Authentication', function($firebase, 
      $firebaseAuth, FIREBASE_URL, $location) {

    var ref = new Firebase(FIREBASE_URL);
    var simpleLogin = $firebaseAuth(ref);
    //Predefine the factory
    var factory = {
       login: login,
       authorized: null
    };

    function login() {
       return simpleLogin.$authAnonymously().then(function(authData) {
          factory.authorized = authData.uid; //Set the property here
      }).catch(function(error) {});
    } 
   //return it
   return factory;
});

如果您具有工厂的引用,并且对其属性的更新将反映(如果您调用填充数据的方法)在控制器中。另一种方法是在工厂中使用getter函数返回auth对象,或者您也可以缓存login函数返回的承诺,并在发生注销用户的事件时将其返回并使其无效。

正如其他人已经指出的,您只更新变量
authorized
,不是属性
auth
。一个相当简单的解决方案是将
auth
更改为始终返回当前值的getter:

var myObject = {
  login : function() {
    ...
  },
  get auth() {
    return authorized;
  }

您不必更改任何其他代码。

身份验证。auth`仅在
身份验证中设置。登录
,您不需要调用此函数。谢谢!这很有道理,并且澄清了很多事情。