Question

我收到一个TransientObjectException

       org.hibernate.TransientObjectException: object references an unsaved transient instance 
- save the transient instance before flushing: EntityB.entityA -> EntityA
    at org.hibernate.engine.CascadingAction$9.noCascade(CascadingAction.java:376)
        at org.hibernate.engine.Cascade.cascade(Cascade.java:162)
        at org.hibernate.event.def.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:454)
        at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:288)
        at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
        at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
        at org.hibernate.ejb.event.EJB3PersistEventListener.saveWithGeneratedId(EJB3PersistEventListener.java:49)
        at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:154)
        at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:110)
        at org.hibernate.impl.SessionImpl.firePersistOnFlush(SessionImpl.java:671)
        at org.hibernate.impl.SessionImpl.persistOnFlush(SessionImpl.java:663)
        at org.hibernate.engine.CascadingAction$9.cascade(CascadingAction.java:346)
        at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:291)
        at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:239)
        at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:192)
        at org.hibernate.engine.Cascade.cascade(Cascade.java:153)

这两个人有一个OneToOne关系：在EntityA

@OneToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
    @JoinColumn(name = "ENTITY_B_ID")
    public EntityB getEntityB() {
        return this.entityB;
    }

并在EntityB中：

@OneToOne(fetch = FetchType.LAZY, mappedBy = "entityB")
    public EntityA getEntityA() {
        return this.entityA;
    }

因此从EntityA到EntityB有一个CascadeType.ALL。我已经检查过我不是直接持久化EntityB，我打印出日志，告诉我只有我正在查看的两个实体是持久的，而entityA实例指向的是指向正确的entityA实例的entityB实例（和我可以从堆栈跟踪中看到持久性来自级联）。因此，entityB因为entityA的级联而持久存在，现在entityB抱怨entityA是短暂的???

任何想法可能会出错？

对象引用未保存的瞬态实例 - 尽管Cascade

0 个答案: