我有两个持久化实体OBJ1和OBJ2。 Obj2包含如下的Obj引用。在Obj1中没有对Obj2的引用(在代码级别 - Java)。休眠:无法删除对象 - 外键约束 - CascadeType.REMOVE
public class Obj2{
....
@ManyToOne(cascade = {CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH, CascadeType.REMOVE}, optional = true)
private Obj1 obj1;
我更新Ojbj 1 @OneToMany的建议:
public class Obj1{
....
@OneToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH, CascadeType.REMOVE,CascadeType.ALL},orphanRemoval = true)
private List<Obj2> obj2;
当我尝试删除OBJ1:
em.remove(obj1Instance)
它失败,因为FOREIGH重点constaint
00:35:23,109 WARN [com.arjuna.ats.arjuna] (http--127.0.0.1-8080-1) ARJUNA012125: TwoPhaseCoordinator.beforeCompletion - failed for SynchronizationImple< 0:ffff7f000101:-7f20c644:5369716f:26, org.hibernate.engine[email protected]dcedf7 >: javax.persistence.PersistenceException: org.hibernate.exception.ConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails (`my_db`.`obj2`, CONSTRAINT `FKC4783505BB5D6339` FOREIGN KEY (`obj1_pk`) REFERENCES `obj1` (`pk`))
...
... 94 more
Caused by: org.hibernate.exception.ConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails (`my_db`.`obj2`, CONSTRAINT `FKC4783505BB5D6339` FOREIGN KEY (`obj1_pk`) REFERENCES `obj1` (`pk`))
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot delete or update a parent row: a foreign key constraint fails (`my_db`.`obj2`, CONSTRAINT `FKC4783505BB5D6339` FOREIGN KEY (`obj1_pk`) REFERENCES `obj1` (`pk`))
我曾经(错误地看来!)asume那CascadeType.REMOVE会照顾这个吗?我应该如何处理这个删除?
/T
我加入了@OneToMany的建议(见上面更新的代码),但它仍然失败出于同样的原因“无法删除或更新父行,外键约束失败... ...约束” – user1843591
你确定数据库表之间没有其他关系,除此之外呢? –
我会稍后再确认。也许问题是在我引入@ONeToMany之前存在的FK约束仍然导致该问题? – user1843591