angularjs - Angular Service - Passing 'this' -

i attempting use external function reduce repeating standard $http call code within angular service , having think scope/this issues. question is, how amend service can make use of 'this' myservice in calls apiget function

example service code:

angular .module('myapp') .factory('myservice', ['$http', function($http) {      function myservice() {         this.uid;         this.stuff;         this.things;     }      myservice.build = function() {         return new myservice();     };      myservice.prototype.setuid = function(uid) {         this.uid = uid;     };      // key part of problem code - have tried this:     myservice.prototype.getstuff = apiget.apply(this,[$http,'stuff',this.uid]);     // , this:     myservice.prototype.getthings = apiget($http,'things',this.uid); }]); 

example external function code:

function apiget($http,collection,uid) { return function() {     return $http({             method:  'get',             url:     '/php/'+collection+'/'+uid,             headers: { 'content-type': 'application/json' }         }).then(function(response) {             return response.data;         });      } }; 

the last lines of service having trouble - if 'hardcode' uid function call service works fine, when use 'this' within arguments call function uid appears 'undefined'.

i've key bits of controller code below - instantiate service , use setuid method apply uid. after other methods within controller call myservice.getstuff methods, etc.

    this.svc = new myservice();     this.svc.setuid(uid); 

it works perfectly, including 'this' bit if don't use apiget function , create service method long hand, i.e:

    myservice.prototype.getstuff = function() {         return $http({             method:  'get',             url:     'php/stuff/'+this.uid,             headers: { 'content-type': 'application/json' }                }).then(function(response) {             return response.data;         });     }; 

btw, i'm pretty new angular , head spinning slight respect scope, $scope, etc

angular services singletons, there's no need deal instance/prototypes directly (since 1 copy created).

angular  .module('myapp')  .factory('myservice', ['$http', 'baseservice', function($http, httpget) {    var uid; //to set setuid;    var myservice = object.create(baseservice); //'inherits' baseservice    angular.extend(myservice, {  //extends custom methods      build: build,      setuid: setuid,      getstuff: _.partial(httpget, $http, "stuff"),      getthings: _.partial(httpget, $http, "things"),    });    return myservice;        function build (){...}    function setuid (){...}    function getstuff (){...}    function getthings (){...}       }]);

to use service, inject service , you'll have access to:

myservice.getthings(this.uid); //calls httpget($http, 'things', uid); myservice.getstuff(this.uid); //calls httpget($http, 'stuff', uid);