实体可以访问存储库吗？

发布于 2024-11-26 09:35:57 字数 350 浏览 2 评论 0 原文

假设我有两个简单的实体：用户和评论。如果用户调用 Review 存储库会有多糟糕？用户获取评论的“干净”方式是什么？

class User
{
    public function getReviews()
    {
        return reviewRepository.findByUser(this);
    }
}

我确实看过这个问题，但是尽管他们说这是一个不好的做法，我在那里没有找到答案。

原文

Say I've got two simple entities: User and Review. How bad is it if User calls the Review repository? What is the "clean" way for the User to get its Reviews?

class User
{
    public function getReviews()
    {
        return reviewRepository.findByUser(this);
    }
}

I did have a look at this question, but although they say this is a bad practice, I didn't find an answer there.

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素年丶 2024-12-03 09:35:57

DDD 中最简洁的方法是在请求用户时让 UserRepository 填写用户的评论。

class UserRepository
{
  public User GetUserByID(long userId)
  {
    var user = CreateUser();
    user.Reviews = FindReviewsforUser(userID);
    return user;
  }
}

但在执行此操作之前，您需要验证域中的用户实体也是 AggregateRoot！只有 AggregateRoots 具有存储库。请查看此问题以查看或获得对问题的一些见解在设计聚合根时。

The clean way in DDD is to have the UserRepository fill the reviews of the User when asking for a User.

class UserRepository
{
  public User GetUserByID(long userId)
  {
    var user = CreateUser();
    user.Reviews = FindReviewsforUser(userID);
    return user;
  }
}

But before you do this, you need to verify that your User Entity in your Domain is also an AggregateRoot! Only AggregateRoots have Repositories. Please take a look at this question to see or get some insights to the problems while desiging aggregateroots.

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