DDD - 在一个非常简单的博客模型中聚合根
作为练习，我尝试使用 DDD 在 .NET 中创建一个简单的博客应用程序。到目前为止，我有 User、Topic 和 Comment 类。但问题是如何将Comment与User和Topic联系起来？如果我说User和Topic是聚合根，那么Comment属于哪里呢？
As an exercise I am trying to create a simple blog app in .NET, employing DDD. So far I have User, Topic and Comment classes. But the problem is how to link Comment with User and Topic? If I say that User and Topic are aggregate roots, where does Comment belong?
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聚合可能与其他聚合根有关联。
例如，评论可能与主题和用户都有关联。
无论如何，这就是我的建模方式，聚合根是一致性的边界。
主题不需要以任何方式与其评论保持一致，因此评论不需要成为该聚合的一部分。
用户不需要与他或她的所有评论保持一致，因此用户也不需要了解评论。
我将通过评论存储库获取特定主题的评论。
例如
Aggregates may have associations to other aggregate roots.
e.g. a comment may have an association to both topic and user.
Thats how I would model it anyway, aggregate roots are boundaries of consistency.
A Topic does not need to be consistent in any way with its comments, thus comments does not need to be part of that aggregate.
A user does not need to be consistent with all of his or her comments so users does not need to know about comments either.
I would fetch the comments for a specific topic by the comment repository.
e.g.