JPA+Hibernate：@OneToOne级联保存无效

Question

创建HUSBAND表 CREATE TABLE HUSBAND ( ID INTEGER, NAME VARCHAR2(10) ); 创建WIFE表 CREATE TABLE WIFE ( ID INTEGER, NAME VARCHAR2(10) ); HUABAND实体及Repository @Entity @Table(name = "HUSBAND", schema = "SYSTEM") public class Husband { @Id @Column(name = "ID") private int id; @Column(name = "NAME") private String name; @OneToOne @Cascade({CascadeType.SAVE_UPDATE}) @PrimaryKeyJoinColumn private Wife wife; // 省略getter、setter及构造函数 } public interface HusbandRepository extends JpaRepository<Husband, Integer> { } WIFE实体及Repositpry @Entity @Table(name = "WIFE", schema = "SYSTEM") public class Wife { @Id @Column(name = "ID") private int id; @Column(name = "NAME") private String name; @OneToOne @PrimaryKeyJoinColumn private Husband husband; // 省略getter、setter及构造函数 } public interface WifeRepository extends JpaRepository<Wife, Integer> { } 为何Husband实体可以正确添加，但Wife实体却没有被级联添加呢？ Husband husband = new Husband(1, "Tim", new Wife(1, "Lucy")); husbandRepository.save(husband); Cascade用的均是Hibernate的类 import org.hibernate.annotations.Cascade; import org.hibernate.annotations.CascadeType; ---------------------------分割线-----------------------------将@Cascade({CascadeType.SAVE_UPDATE})修改为@Cascade({CascadeType.MERGE})则级联新增、修改都可以实现，但是我想明确的指定为新增级联就是不行