一对一删除持久对象

Question

我使用openjpa作为映射层，我有两个模型：user：

@Entity
@Table(name = "USERS")
public class User
{
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "user_id_gen")
    @SequenceGenerator(name = "user_id_gen", sequenceName = "manage.users_id", allocationSize=1)
    @Column(name = "id", nullable = false)
    private int _id;

    @OneToOne (cascade=CascadeType.ALL, fetch = FetchType.EAGER)
    @JoinColumn(name="fk_image_id", insertable=true, updatable=true, nullable = true)
    private Image _image;

和图像

@Entity
@Table(name = "IMAGES")
public class Image
{
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "images_id_gen")
    @SequenceGenerator(name = "images_id_gen", sequenceName = "manage.image_id", allocationSize=1)
    @Column(name = "id")
    private int _id;

它是单向一对一关系。

问题是我想删除图像而不删除用户，而当我删除用户时，再删除与他关联的图像。

现在，当我删除图像时，它也会删除用户！

Answer 1

找到了解决方案。 我将图像字段设置为null并保存用户对象，然后删除图像。