public ActionResult Rate(CenterRatingCreate model) { if (!ModelState.IsValid) { return(View(model)); } var service = new RatingService(Guid.Parse(User.Identity.GetUserId())); if (service.CreateCenterRating(model)) { TempData["SaveResult"] = "Your rating was added."; return(RedirectToAction("Index")); } ; ModelState.AddModelError("", "Rating could not be added."); return(View(model)); }