public void Delete(int id)
        {
            BeverageInventory rate = db.BeverageInventories.Find(id);

            if (rate != null)
            {
                db.BeverageInventories.Remove(rate);
                db.SaveChanges();
            }
        }
        public void Create(BeverageInventoryViewModel model)
        {
            BeverageInventory inv = new BeverageInventory
            {
                MenuItemId  = model.MenuItemId,
                DrinkType   = model.DrinkType,
                Price       = model.Price,
                Producer    = model.Producer,
                ProductName = model.ProductName,
                Age         = model.Age
            };

            db.BeverageInventories.Add(inv);

            db.SaveChanges();
        }