public JsonResult AddVoting(string userName, int photoId, int rating)
        {
            int userId = userService.GetUserByEmail(userName).UserId;

            votingService.Create((new VotingViewModel()
            {
                UserId = userId, PhotoId = photoId, Rating = rating
            }).ToBllVoting());

            int    raters      = GetRaters(photoId);
            double totalRating = Math.Round(GetTotalRating(photoId), 1);
            var    jsondata    = new { Raters = raters, Rating = totalRating };

            return(Json(jsondata));
        }