使用级联的Hibernate软删除将FK设置为​​NULL

Question

我正在尝试使用以下实体的Hibernate注释实现软删除：

@MappedSuperclass
public abstract class AbstractEntity implements Serializable {
  ...
@Column(name = "DELETED")
protected boolean deleted = false;
  ...
}

@Entity
@Table(name = "TARGET")
@Where(clause = "deleted = '0'")
@SQLDelete(sql = "UPDATE target SET deleted = '1'")
public class Target extends AbstractEntity {
  ...
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@JoinColumn(name = "TARGET_ID")
private Set<Recording> recordings;
  ...
}

@Entity
@Table(name = "RECORDING")
@Where(clause = "deleted = '0'")
@SQLDelete(sql = "UPDATE recording SET deleted = '1'")
public class Recording extends AbstractEntity {
  ...
@ManyToOne
@JoinColumn(name = "TARGET_ID")
private Target target;
  ...
}

删除本身是对EntityManager的调用：

entityManager.remove(target);

此调用后，Target及其所有录制内容都已按预期删除标记设置为TRUE。 但是记录也将TARGET_ID列设置为NULL，这非常不幸，因为关系丢失了。这不是我所期望的，恢复状态是不可能的。 我希望TARGET_ID仍然能够引用Target。

我做错了吗？或者我是否必须手动为每个录音调用删除而不使用级联？

完成Spring Data JPA 1.11.4，Hibernate 5.0.12和JPA2.1。

感谢您提供任何提示

Answer 1

你的@OneToMany从Target到Recordings的关系是不正确的。尝试：

@OneToMany(mappedBy="target", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
private Set<Recording> recordings;