public string Buy(OrderModel model)
        {
            var customerId = _db.GetCustomerIdByName(model.CustomerName);

            if (customerId == null)
            {
                _db.AddCustomer(model.CustomerName);
            }

            customerId = _db.GetCustomerIdByName(model.CustomerName);
            var order = new Order
            {
                WhoreId    = model.WhoreId,
                CustomerId = customerId
            };

            _db.AddOrder(order);
            return("Ваш заказ принят");
        }