public ActionResult Details(DetailsPhotoViewModel photo)
        {
            var picture = _photoRepository.FindById(photo.Id);

            photo.MapPhoto(picture);

            return(View(photo));
        }
        public ActionResult AddComment(CommentViewModel model)
        {
            model.Commenter = User.Identity.Name;
            _commentRepository.Add(model.MapComment());

            var photo   = new DetailsPhotoViewModel();
            var picture = _photoRepository.FindById(model.PhotoId);

            photo.MapPhoto(picture);

            return(PartialView("Comments", photo.Comments));
        }