级联删除我的父实体时遇到问题:
org.postgresql.util.PSQLException:表“child”上的更新或删除违反了约束“XXX”:对于键(id)=(4),表“child_properties”中有引用
@Entity
@Table(name = "Parent")
public class Parent{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@OneToMany(fetch = FetchType.EAGER,mappedBy = "parent")
@OnDelete(action = OnDeleteAction.CASCADE)
private Set<Child> children;
}
@Entity
@Table(name = "child")
public class Child{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@ManyToOne
@JoinColumn(name = "parent_id")
private Parent parent;
@ElementCollection(fetch = FetchType.EAGER)
private Map<String,String> properties;
}
我希望子级删除其在parentRepository.delete(parent)上的属性 但这只发生在 childRepository.delete(child) 上。父级删除抛出异常
最佳答案
解决方案大约花了 3 个小时谷歌搜索...... 这个想法是设置自定义外键
@ElementCollection(fetch = FetchType.EAGER)
@CollectionTable(name = "child_properties"
,joinColumns = {
@JoinColumn(name = "child_id"
, referencedColumnName = "id"
,foreignKey=@ForeignKey(name="CHILD_PROPERTY_FK"
, foreignKeyDefinition = "FOREIGN KEY (child_id) references public.child (id) MATCH SIMPLE ON UPDATE NO ACTION ON DELETE CASCADE"))
}
)
@MapKeyColumn(name = "name")
@Column(name = "value")
private Map<String,String> properties;
关于java - 使用 @ElementCollection 对实体进行级联删除,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58431753/