小编Stu*_*ent的帖子

我有两个实体，相关如下

@Entity
@Table(name = "APPOINTMENT")
public class Appointment {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long codeAp;

    @ManyToOne(fetch = FetchType.EAGER)
,   @OnDelete(action = OnDeleteAction.CASCADE)
    @JoinColumn(name = "codeP")
    private Patient patient;

    //attributes
    //getters and setters
    //constructors



@Entity
@Table(name = "PATIENT")
public class Patient {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long codeP;

    //attributes
    //getters and setters
    //constructors

我正在使用JpaRepository删除方法。数据库中的表PATIENT和APPOINTMENT之间有一个约束，当我删除Patient时，我想删除孤儿。我添加了@OnDelete休眠注释，但是它对我不起作用！你能告诉我为什么吗？我想保持这种单向关系，请您帮我一下？