public IActionResult Uredi(int id)
        {
            MyContext    db    = new MyContext();
            Avion        a     = db.Avion.Where(i => i.AvionID == id).Include(i => i.Klasa).FirstOrDefault();
            AvionUrediVM model = new AvionUrediVM()
            {
                id    = id,
                klase = db.Klasa.Select(x => new SelectListItem
                {
                    Value = x.KlasaID.ToString(),
                    Text  = x.Naziv
                }).ToList(),
                Naziv     = a.Naziv,
                Kapacitet = a.Kapacitet
            };

            db.SaveChanges();
            db.Dispose();
            return(View(model));
        }
        public IActionResult UrediSnimi(AvionUrediVM model)
        {
            MyContext db = new MyContext();
            Avion     a  = db.Avion.Where(i => i.AvionID == model.id).Include(i => i.Klasa).FirstOrDefault();

            a.Naziv     = model.Naziv;
            a.Kapacitet = model.Kapacitet;
            a.AvionID   = model.id;
            List <SelectListItem> klase = db.Klasa.Select(x => new SelectListItem
            {
                Value = x.KlasaID.ToString(),
                Text  = x.Naziv
            }).ToList();

            a.KlasaID = model.klaseID;
            db.SaveChanges();
            db.Dispose();

            return(RedirectToAction("Prikazi"));
        }