ddd-值对象以覆盖每个属性 [英] ddd - value objects to cover every property
问题描述
实现与第三方系统的集成，该系统可以从网站导出产品和导入订单。
Implementing an integration with a 3rd party system which exports products and imports orders from a web site.
在设计中已经完成了一些ddd工作，并继续进行
There is some ddd work already done in the design and to continue it i would like.
订单和产品上的每个属性都应包含值对象吗？
Should every single property on the order and products be covered with a value object?
这将意味着大约100个类，以覆盖似乎过剩的所有可能的属性：
This would mean around 100 classes to cover all possible properties which seems excessive:
- ProductSku
- ProductName
- ProductDescription
- ProductPrice
- etc ...
- ProductSku
- ProductName
- ProductDescription
- ProductPrice
- etc...
推荐答案
订单和产品上的每个属性都应包含
a值对象吗？ / p>
Should every single property on the order and products be covered with a value object?
在我知道的任何语言中，原始值已经是一个值对象：不可变且没有标识（即字符串，数字等）。
In any language that I know a primitive value is already a value object: immutable and without an identity (i.e. strings, numbers etc).
如果您指的是我应该创建一个新类来包含该数据和行为，那么我说YAGNI。如果找不到执行此操作的充分理由（您需要强类型键入，将隐式显示为显式等），请不要立即执行此操作。等到您将需要它。
If you are referring to "Should I create a new class to encompass that data + behavior" then I say YAGNI. If you can't find a good reason to do it (you need strong typing, you make the implicit explicit etc) then don't do it right now. Wait until you will gonna need it.
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