Revealing module pattern for implementing a service in Angular.js

dataservice.js

.factory("dataService", ["$http", "$q", function ($http, $q) {

  var _ratingEntities = [];
  
  var _getRatingEntities = function (options) {
  
      var deferred = $q.defer();
  
      $http.get("api/RatingEntityProfileApi?currentPage=" + options.currentPage + "&" + "recordPerPage=" + options.recordsPerPage
          + "&" + "sortKey=" + options.sortKey + "&"
          + "sortOrder=" + options.sortOrder
          + "&" + "searchBy=" + options.searchBy)
          .then(function (result) {
            
              angular.copy(result.data.RatingEntityProfiles, _ratingEntities);
              deferred.resolve(result.data.RecordCount);
          },
            function () {

                deferred.reject();
            });
  
      return deferred.promise;
  };
  
  
  var _postRatingEntity = function (record) {
  
      var deferred = $q.defer();
  
      $http.post("api/RatingEntityProfileApi", record).then(
          function (result) {
            
              deferred.resolve(result.data);
              console.log(result);
          },
          function () {
            
              deferred.reject();
          });
  
      return deferred.promise;
  };
  
  var _deleteRatingEntity = function (id) {
  
      var deferred = $q.defer();
  
      $http.delete("api/RatingEntityProfileApi/" + id).then(
          function (result) {
            
              deferred.resolve(result.data);
              console.log(result);
          },
          function () {
            
              deferred.reject();
          });
  
      return deferred.promise;
  };
  
  return {
    
      ratingEntities: _ratingEntities,
      getRatingEntities: _getRatingEntities,
      postRatingEntity: _postRatingEntity,
      deleteRatingEntity: _deleteRatingEntity
  };
}])