Spring JPA - @OneToMany为每个关系创建单独的表

Posted 2021-04-03

我想创建一个名为的类型

@Entity
class TestType {
   @Id
   private Long id;
   private String field1;
   private String field2;
}

@Entity
class Agregator{
   @Id
   private Long id;
   private String name;
   @OneToMany
   private List<TestType> newTypes;
   @OneToMany
   private List<TestType> oldTypes;
}

我想要3张桌子：

• 聚合
• agregator_new_types，列为agregator_id;
• agregator_old_types，列为agregator_id;

我如何定义关系来获取这样的表和列？

答案

@Embeddable
class TestType {
   @Id
   private Long id;
   private String field1;
   private String field2;
}

@Entity
class Agregator{
   @Id
   private Long id;
   private String name;
   @ElementCollection
   private List<TestType> newTypes;
   @ElementCollection
   private List<TestType> oldTypes;
}