解决方法
您通常会将此封装在Aggregate对其合同公开的命令中.
例如,使用Order Aggregate,您可以使用从GUI获取的数据添加OrderLines.
// This is the Order Aggregate Root
public class Order
{
private readonly int id;
private readonly Customer customer; // Customer is another Aggregate
private readonly IList<OrderLine> orderLines;
private readonly IOrderLineFactory orderLineFactory;
public Order(int id,Customer customer,IOrderLineFactory orderLineFactory)
{
this.id = id;
this.customer = customer;
this.orderLines = new List<OrderLine>();
this.orderLineFactory = orderLineFactory;
}
public void AddOrderLine(Item item,int quantity)
{
OrderLine orderLine = orderLineFactory.Create(this,item,quantity);
orderLines.Add(orderLine);
}
}
