AngularJS - access factory service from the controller - angularjs

Question

I'm trying to access factory service within controller to obtain correct data.
Related controller code looks like:
myApp.controller('RegistrationController', ['$scope','$routeParams','$rootScope','$location','$filter','$mdDialog','checkAttendee', function($scope, $routeParams, $rootScope, $location, $filter, $mdDialog,checkAttendee){
...
$scope.addAttendee = function(ev) {
$mdDialog.show({
controller: AddDialogCntrl,
templateUrl: 'views/regForm.tmpl.html',
parent: angular.element(document.body),
targetEvent: ev,
clickOutsideToClose:true,
controllerAs: 'ctrl',
fullscreen: $scope.customFullscreen, // Only for -xs, -sm breakpoints.
locals: {parent: $scope}
})
.then(
function(response){
if(angular.isDefined(response)){
attendees.push(response);
checkAttendee.getAttendeeInfo(response);
}
},
function(){
//no changes
}
)
.catch(
function(error) {
console.log('Error: ' + error);
}
)
};
and factory service code
myApp.factory('checkAttendee', ['$http', function($http) {
this.getAttendeeInfo = function(req) {
return $http.get("/check/attendee/", {params:{"firstName":req.firstName, "lastName":req.lastName, "email": req.email, "eventID": req.eventID}})
.then(function(response) {
var data = response.data;
var status = response.status;
var statusText = response.statusText;
var headers = response.headers;
var config = response.config;
console.log('Data: ' + data);
console.log('Status: ' + status);
return data;
})
.catch(function(response) {
console.log('something worng');
});
}
}]);
but that combination gives me an error Provider 'checkAttendee' must return a value from $get factory method. when there is a return value.
Any thoughts?

Answer 1

Option 1
When we work with factories the structure should be:
myApp.factory('checkAttendee', ['$http', function($http) {
var factory = {
getAttendeeInfo : function () {
return $http.get(/**/).then(function(response) {
// ..
return data;
}
}
}
return factory;
}]);
DEMO 1
Option 2
you can change factory to service and everything should work. A.e.:
myApp.service('checkAttendee', ['$http', function($http) {
this.getAttendeeInfo = function(req) {
return $http.get("/check/attendee/", {params:{"firstName":req.firstName, "lastName":req.lastName, "email": req.email, "eventID": req.eventID}})
.then(function(response) {
var data = response.data;
var status = response.status;
var statusText = response.statusText;
var headers = response.headers;
var config = response.config;
console.log('Data: ' + data);
console.log('Status: ' + status);
return data;
})
.catch(function(response) {
console.log('something worng');
throw response;
});
}
}]);
DEMO 2
Keep in mind that service extends the factory