Hibernate引发无法删除或更新父行：外键约束失败

Question

我正在处理一个测试cascade delete操作的基本示例，但我得到了异常。

我有以下实体：

@Entity
public class Employee {
    @Id
    @Column(name = "EMP_ID")
    private long id;

    private String name;

    @OneToMany(mappedBy = "employee")
    @Cascade(value = { CascadeType.REMOVE, CascadeType.SAVE_UPDATE })
    private List<EmpDetails> details = new ArrayList<EmpDetails>();

}

@Entity
public class EmpDetails {
    @Id
    private long id;
    private int info;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "EMP_ID")
    private Employee employee;
}

    session.beginTransaction();

    session.delete(new Employee(10)); // here 10 is the ID of the employee

    session.getTransaction().commit();
    session.close();

有人能帮助我如何测试级联删除选项在这里吗？

Answer 1

REMOVE级联类型用于标准的JPAREMOVE()操作。对于本机Hibernatedelete()操作，需要使用Hibernate专有注释：

@Cascade(CascadeType.DELETE)