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我使用的OpenJPA作为一个映射层和我有两个型号: 用户:删除一个持久对象,以一对一的关系
@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;
是单向的一对一关系。
问题是我想删除图像而不删除用户,当我删除用户然后删除与他相关的图像。
现在,当我删除一个图像,它删除用户以及!
只需通过删除Cascade = CascadeType.ALL – Pratik 2015-04-01 12:06:55