Grails多對多和一對多的沖突

Question

我有以下兩個域類，用戶和帖子我和他們之間有兩個關系，用戶有一對多的帖子和后面的參考。 用戶與他所關注的帖子有多對多的關系：我得到的關系如下：

User {
hasMany = [posts : Post, followingPosts: Post]
belongsTo = [Post] //For the many-to-many, this is the owner i'd like to have.

}

Post {
  hasMany = [followers: User]
  belongsTo = [owner: User] //For the 1-to-Many, this is my back-reference
}

現在我和Grails發生了沖突，我嘗試通過映射解決它，但沒有成功，這是我得到的錯誤：

    Domain classes [Post] and [User] cannot own each other in a many-to-many relationship. Both   contain belongsTo definitions that reference each other. (Use --stacktrace to see the full trace)

有誰知道如何解決這個問題？

Answer 1

我認為你可以使用mappedBy來做，比如：

class User{

  static hasMany = [posts : Post, followingPosts: Post]
  static mappedBy = [posts : "user"]
}


class Post{  

  User user
  static hasMany = [followers: User]
  static belongsTo = User
}

有關mappedBy的更多信息，請查看此內容。