不能删除父级和子级

Question

我有两个实体使用Spring和Hibernate

@Entity
@Table(name = "A")
public class A {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Integer id;

    @OneToOne(cascade = CascadeType.ALL, mappedBy = "a")
    private B b;

@Entity
public class B{

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Integer id;

    @OneToOne
    @JoinColumn(name = "a_ID")
    private A a;

MySQLIntegrityConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails

Answer 1

将类A中的OrphanRemove属性设置为true

如下所示:@onetoone(mappedBy=“a”,cascade=cascadetype.all,orphanremove=true)