public async Task AddDishToOrderAsync(DishOrdersDto dishOrders)
{
var origDishOrders = _mapper.Map <DishOrdersDto, DishOrders>(dishOrders);
var order = await _orderRepository.Get(dishOrders.OrderId);
var dish = await _dishRepository.Get(dishOrders.DishId);
order.TotalPrice += dish.Price * dishOrders.PortionNumber;
await _orderRepository.Update(order);
await _orderRepository.AddDishToOrderAsync(origDishOrders);
}