JPA에서 복수의 pk 지정하기

https://stackoverflow.com/questions/13032948/how-to-create-and-handle-composite-primary-key-in-jpa.

1. @EmbeddedId 활용.

@Entity
public class YourEntity {
    @EmbeddedId
    private MyKey myKey;

    @Column(name = "ColumnA")
    private String columnA;

    /** Your getters and setters **/
}

@Embeddable
public class MyKey implements Serializable {

    @Column(name = "Id", nullable = false)
    private int id;

    @Column(name = "Version", nullable = false)
    private int version;

    /** getters and setters **/
}

---

2. @IdClass 활용.

@Entity
@IdClass(MyKey.class)
public class YourEntity {
   @Id
   private int id;
   @Id
   private int version;

}

public class MyKey implements Serializable {
   private int id;
   private int version;
}

 

필자의 경우 getter/setter가 필요없는 2. 방법을 활용했다.