public IActionResult Create(AchOrderAdditive newItem)
        {
            var newId = _context.AchOrderAdditive.OrderByDescending(i => i.IdOrderAddiive).FirstOrDefault().IdOrderAddiive + 1;

            newItem.IdOrderAddiive = newId;

            _context.AchOrderAdditive.Add(newItem);
            _context.SaveChanges();
            return(StatusCode(201, newItem));
        }
        public IActionResult Update(int item_id, AchOrderAdditive updated_item)
        {
            var item = _context.AchOrderAdditive.Count(e => e.IdOrderAddiive == item_id);


            if (item == 0)
            {
                return(NotFound());
            }

            updated_item.IdOrderAddiive = item_id;
            _context.AchOrderAdditive.Attach(updated_item);
            _context.Entry(updated_item).State = EntityState.Modified;
            _context.SaveChanges();
            return(Ok(updated_item));
        }