我有以下情况:
基本类别:
@Entity(name = "BaseEntity")
@Inheritance(strategy= InheritanceType.JOINED)
@DiscriminatorColumn(name="DISCR_COLUMN", discriminatorType = DiscriminatorType.STRING)
@Table(name = "base")
@DiscriminatorOptions(insert = true,force=true)
public abstract class Base implements Serializable {
子类:
@Entity(name = "SubclassEntity")
@DiscriminatorValue("A")
@Table(name="subclass")
@PrimaryKeyJoinColumn(name = "subclass_id", referencedColumnName = "base_id")
@DiscriminatorOptions(insert = true,force=true)
public class Subclass extends Base {
存储库:
public interface BaseRepository extends JpaRepository<Base, String>, JpaSpecificationExecutor<Base> {
我唯一的问题是当我想创建一个新的子类时
repository.saveAndFlush(Base base);
鉴别器值未保存,并且在DB中显示为NULL。我想它是由hibernate自动设置的,不是吗?
注意:请参阅下面的注释(!)
根据http://en.m.wikibooks.org/wiki/Java_Persistence/Inheritance部分";Joined,Multiple Table Heritage":
Hibernate不支持继承策略的鉴别器列:joind。