Hibernate：如何级联未映射的实体？

Question

Is it possible to set cascade without mapping one to many relationships?

I have two entities:

@Entity
@Table(name = "USER")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID")
    private Long id;

    ...
}

and

@Entity
@Table(name = "RECORD")
public class Record  {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID")
    private Long id;

    @ManyToOne
    @JoinColumn(name = "USER")
    private User user;

    ...
}

If I try to delete a user and there exists any record of that user it obviously fails because of the foreign key. I would like to delete all of the user's records before deleting the user. I see two options:

1. Map Record s as @OneToMany relationship in User and set cascade .

    @OneToMany(mappedBy = "user", cascade = CascadeType.REMOVE) private Set<Record> records; 

2. Delete them manually before deleting user

Is there any third option, how to set cascade without mapping records in the user entity?

Answer 1

级联对JPA不利，最好手动处理。