聚合根中实体的操作 [英] Operations on entities within a aggregate root
本文介绍了聚合根中实体的操作的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如果我设计了如下所示的AR,您如何认为应该更新一个订单行对象之一中的属性?
If i have designed an AR like the below, how do you think i should go about say updating a property in one of the order line objects ?
例如我如何更改我的订单行之一的标题(示例问题)
For Example how can i change the title for one of my order lines (example question)
这是订单汇总根
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);
}
}
推荐答案
Order order = orderRepository.find(orderId);
order.changeTitle(orderLineId, "New title");
其中 orderLineId可以是行号或索引,只要是聚合的-root特定的(不是全局ID)。请参阅此对类似问题的答案。
Where 'orderLineId' can be a line number or an index or something else as long as it is aggregate-root-specific (not a global id). Please see this answer to a similar question.
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