angularjs - angular factory return data remained same after changing the json file -

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i calling camera.json file "cameradata" service , injecting cameradata service in "cameracontroller". if change camera.json after clicked on refresh button getting old data. idea?

.factory('cameradata', function ($http, $q,globalvariable) { var deferred = $q.defer();

var cameradata = {};      var contenttype  = "application/json; charset=utf-8";     cameradata.getitemlist = function(){      $('.loader').show();     var senddata ={};     senddata.installedcameraid = "9547857793457943";       $http({         //url: globalvariable.serveraddress + "admin_getcamerapoints",         url: globalvariable.camerafilepath,         datatype: 'json',         method: "post",         data: json.stringify(senddata),         headers: {             "content-type": contenttype,             "access_token": globalvariable.token         }      }).success(function(response){          //$scope.response = response;         deferred.resolve(response);         return deferred.promise;      }).error(function(error){         //$scope.error = error;         deferred.reject(error);     });       return deferred.promise; }   return cameradata;

})

.controller('cameracontroller',function($scope,$timeout,cameradata){ $scope.refreshcameradata = function(){

    $scope.allcamera = [];     cameradata.getitemlist()     .then(function(data) {         $scope.allcamera = data.camera;     }, function(err) {         // promise rejected, log error          console.log('error', err);     });  }  cameradata.getitemlist()     .then(function(data) {         $scope.allcamera = data.camera;     }, function(err) {         // promise rejected, log error          console.log('error', err);     });

})

you need create defer object everytime call factory method. should return new promise everytime call api. change factory code following.

var cameradata = {}; $('.loader').show();         var contenttype  = "application/json; charset=utf-8";     cameradata.getitemlist = function(){     // need create defer object everytime      var deferred = $q.defer();      $('.loader').show();     var senddata ={};     senddata.installedcameraid = "9547857793457943";       $http({         //url: globalvariable.serveraddress + "admin_getcamerapoints",         url: globalvariable.camerafilepath,         datatype: 'json',         method: "post",         data: json.stringify(senddata),         headers: {             "content-type": contenttype,             "access_token": globalvariable.token         }      }).success(function(response){          //$scope.response = response;         $('.loader').hide();         deferred.resolve(response);         return deferred.promise;      }).error(function(error){         //$scope.error = error;         $('.loader').hide();         deferred.reject(error);     });       return deferred.promise; }   return cameradata; })

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