Angularjs：将数据存储到一个工厂调用的变量中,以便在另一个工厂

我对 angularjs和ionic都是全新的.我尝试将从工厂调用中收到的4个值存储到4个变量中,我需要将其用作另一个函数中$http get调用的参数：

这是我的控制器开头定义的4个变量：

var firstId;
var firstTimestamp;
var lastId;
var lastTimestamp;

我从以下调用工厂收到数据并将数据分配给变量：

ContentFactory.getAlbums().then(function(albums){

   $scope.albums = albums;

   firstId = albums.first_id;
   firstTimestamp = albums.first_timestamp;
   lastId = albums.last_id;
   lastTimestamp = albums.last_timestamp;
});

然后我尝试将这些变量用作我工厂的另一个调用的参数(在视图中调用loadOlderAlbums)：

$scope.loadOlderAlbums = function(lastId,lastTimestamp) {
 ContentFactory.getOlderAlbums(lastId,lastTimestamp).then(function(albums){
    $scope.albums = $scope.albums.concat(albums);
    $scope.$broadcast('scroll.infiniteScrollComplete');
 });
};

变量lastId&检查我的工厂时,lastTimestamp未定义：

getOlderAlbums : function(lastId,lastTimestamp){
        console.log(lastId); // lastId is undefined
        return $http.get('http://api.domain.xxx/albums/city/1? &direction=before&id=' + lastId + '&time=' + lastTimestamp + '&api_key=******&lang=en').then(function(response) {
                albums = response.data;
                return albums;
        });
    }

在控制台中,我看到以下错误：

GET http://api.domain.xxx/albums/city/1?&direction=before&id=undefined&time=undefined&api_key=***&lang=en 500 (Internal Server Error)

因为id&时间不确定.

这是完整的控制器：

.controller('PicturesCtrl',function($scope,$ionicLoading,ContentFactory) {

$scope.albums = [];

var firstId;
var firstTimestamp;
var lastId;
var lastTimestamp; 

ContentFactory.getAlbums().then(function(albums){
  $scope.albums = albums;
  firstId = albums.first_id;
  firstTimestamp = albums.first_timestamp;
  lastId = albums.last_id;
  lastTimestamp = albums.last_timestamp;

  // console.log(firstId);  -> values are correctly stored
  // console.log(firstTimestamp); -> values are correctly stored
  // console.log(lastId); -> values are correctly stored
  // console.log(lastTimestamp); -> values are correctly stored

 });


$scope.loadOlderAlbums = function(lastId,lastTimestamp).then(function(albums){
    $scope.albums = $scope.albums.concat(albums);
    $scope.$broadcast('scroll.infiniteScrollComplete');
 });
};

})

和工厂：

.factory('ContentFactory',function($http) {

var albums = [];

return {



    getAlbums : function(){
        return $http.get('http://api.domain.xxx/albums/city/1?lang=en&api_key=***').then(function(response) {
                albums = response.data;
                return albums;
        });
    },getOlderAlbums : function(lastId,lastTimestamp){
        console.log(lastId); // lastId is undefined
        return $http.get('http://api.domain.xxx/albums/city/1?&direction=before&id=' + lastId + '&time=' + lastTimestamp + '&api_key=***&lang=en').then(function(response) {
                albums = response.data;
                return albums;
        });
    }
   }
})

我们非常感谢任何帮助以找出变量值未传递给第二次工厂调用的原因.它可能是一个合乎逻辑的问题,因为我是一个新手;)

更新：

请在下面找到我在Content.Factory.getAlbums中第一次$http GET调用时收到的示例回复

{
"city_id": 1,"total_pages": 199,"total_results": 3977,"first_id": 15448,"first_timestamp": 1437230820,"results": [
    {
        "album_id": "15448","title": "MAD pres. Splash The Madness Party at Aftermoon","description": "The MAD crew is back and returned to Aftermoon for a night of Melbourne Bounce,Hip Hop,Big Room,Electro- and Progressive House. At the decks were Dam-Sib-Dao,Beatender,Madz Mellow & Odyszey,supported by Mc Ben10.","photographer_id": "8","photographer_name": "ploy","image_count": "88","cover_image": "5dd26da7f37da641d775568d2e98ae44.jpg","date": "2015-07-18 21:47:00","location_id": "705","location_name": "Aftermoon"
    },{
        "album_id": "15446","title": "Superhero Charity Party at KU Dé TA Bangkok","description": "KU Dé TA Bangkok and the charity organisation "Habitat for Humanity Thailand" joined forces for the SUPERHERO “CHARITY PARTY". Habitat for Humanity Thailand improves the quality of Thai people’s lives through building homes and transforming communities. Entry is Free,but there guests are invited to do a FREE-WILL DONATION of which 100% will go to Habitat for Humanity Thailand to build houses under the program “Make Her Day” in Pathumthani.","photographer_id": "15","photographer_name": "win","image_count": "176","cover_image": "742a0065d046418041175ff8005d7174.jpg","date": "2015-07-18 18:46:00","location_id": "809","location_name": "KU Dé TA"
    }
],"last_id": 15427,"last_timestamp": 1437062520
}

在我的视图中调用$scope.loadOlderAlbums(离子无限滚动)

<ion-infinite-scroll
  on-infinite="loadOlderAlbums()"
  distance="1%">
</ion-infinite-scroll>

<button ng-click="loadOlderAlbums()">Load more albums</button>

$scope.loadOlderAlbums = function() {
 ContentFactory.getOlderAlbums(lastId,lastTimestamp).then(function(albums){
    $scope.albums = $scope.albums.concat(albums);
    $scope.$broadcast('scroll.infiniteScrollComplete');
 });
};

var lastId,lastTimeStamp: 

getAlbums().then(function (res) {
  lastId = res.lastId;
  lastTimeStamp = res.lastTimeStamp;
});

/** Later,called from the view **/
function loadOlderAlbums () { // <-- Kill the arguments.
  $http.get('path' + lastId + lastTimeStamp).then(function (res) {
    /** woop woop! **/ 
  }); 
}

var loaded = false;

function getAlbums () {
   $http.get('albums').then(function (res) {
     /** set the ID's and timestamps **/ 
     loaded = true;
   });
}

function loadOlderAlbums () {
  if (!loaded) {
    throw new Error('Yep,nope. We have to get some other albums first. Sorry!');
  }

  /** your old loadOlderAlbums implementation **/ 
}

.state('...',{
  controller: 'PicturesCtrl',resolve: {
    preloadedAlbums: function (ContentFactory) { // available for DI later into your controller.
      return ContentFactory.getAlbums().then(function (response) {
        return {
          albums:  response,firstId: response.first_id,firstTimeStamp: response.first_timestamp,lastId: response.last_id,lastTimeStamp: response.last_timestamp
        }; 
      });
    }
  }
}

.controller('PicturesCtrl',function ($scope,ContentFactory,preloadedAlbums) {

  $scope.albums = preloadedAlbums;

  var lastId = preloadedAlbums.lastId;
  var lastTimeStamp = preloadedAlbums.lastTimeStamp; 
  /** etc **/ 
});