public ActionResult <RemoveOrAddedOrderItemDTO> AddOrderItemByOne(long orderItemId)
{
try
{
OrderItem oi = _orderItems.GetById(orderItemId);
oi.AddOne();
_orderItems.SaveChanges();
return(new RemoveOrAddedOrderItemDTO(oi.Order, oi));
}
catch (ArgumentNullException)
{
return(NotFound(new CustomErrorDTO("Order item niet gevonden")));
}
}