/// <summary>
        /// Method GetRatingForPhotoUser return rating for photo by.
        /// </summary>
        /// <param name="photoId">Photo id.</param>
        /// <param name="userId">User id.</param>
        /// <returns>Returns rating for photo by user.</returns>
        public int GetRatingForPhotoUser(int photoId, int userId)
        {
            try {
                return(votingRepository.GetRatingForPhotoUser(photoId, userId));
            }
            catch (Exception ex) {
                logger.Error(logger.GetMessage("Get rating for photo by user was failed.", this), ex);
            }

            return(default(int));
        }