internal OrderItem(long orderId, OrderItemProduct product, int count)
{
this.Id = product.Id;
this.OrderId = Checker.GTZero(orderId, nameof(orderId));
this.Product = Checker.NotNull(product, nameof(product));
this.Count = Checker.GTZero(count, nameof(count));
}
/// <summary>
/// 添加订单产品
/// </summary>
/// <param name="product"></param>
/// <param name="count"></param>
public void AddProduct(OrderItemProduct product, int count)
{
Checker.NotNull(product, nameof(product));
Checker.GTZero(count, nameof(count));
var existProduct = this.Items.FirstOrDefault(x => x.Product.Id == product.Id);
if (existProduct == null)
{
this.Items.Add(new OrderItem(this.Id, product, count));
}
else
{
existProduct.ChangeCount(count);
}
this.Amount += product.Price * count;
}