public ActionResult AddMovie()
        {
            var femaleActors = this.actorsRepo
                .All()
                .Select(ActorViewModel.FromActor)
                .Where(a => a.IsFemale)
                .ToList();

            var maleActors = this.actorsRepo
                .All()
                .Select(ActorViewModel.FromActor)
                .Where(a => !a.IsFemale)
                .ToList();

            var studios = this.studiosRepo
                .All()
                .Select(StudioViewModel.FromStudio)
                .ToList();

            var model = new MovieAddViewModel()
            {
                FemaleActors = femaleActors,
                MaleActors = maleActors,
                Studios = studios
            };

            return View("_PartialAddMovie", model);
        }
        public ActionResult AddMovie(MovieAddViewModel model)
        {
            if (ModelState.IsValid)
            {
                return this.RedirectToAction("AddMovie", "Movies", model);
            }

            else
            {
                return this.PartialView("Error");
            }
        }
        public ActionResult AddMovie(MovieAddViewModel movie)
        {
            var femaleLead = this.actorsRepo.GetById(movie.SelectedFemaleLeadId);
            var maleLead = this.actorsRepo.GetById(movie.SelectedMaleLeadId);
            var studio = this.studioRepo.GetById(movie.SelectedStudioId);

            this.moviesRepo.Add(new Movie()
            {
                Title = movie.Title,
                Director = movie.Director,
                Year = movie.Year,
                FemaleLead = femaleLead,
                MaleLead = maleLead,
                Studio = studio
            });

            this.moviesRepo.SaveChanges();

            return this.RedirectToAction("Index");
        }