非唯一列一到多映射上的休眠映射

Question

我有两张桌子

Person
   id --> PK
   name
   media_id

Media
  id --> PK
  media_id
  other_details

Media.Media_id 会有重复的值

现在我想将所有媒体记录加载到具有给定媒体 ID 的人身上

public class Person{

    @Id
    private id;

    private String name;

    @OneToMany  (**Want to map using MEDIA ID**)
    private List<Media> media= new ArrayList<>();

}

Person to Media 是单向的，想知道怎么做这个映射

Answer 1

这不是 oneToMany 关系。你可以像这样使用@Formula

public class Person{

@Id
private id;

private String name;

private int media_Id // Add a mediaId field to refer to it in the formula

@Transient
@Formula("SELECT * FROM MEDIA WHERE MEDIA_ID = media_Id")
private List<Media> media= new ArrayList<>();

}