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我得到一个 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)

这两个实体具有 OneToOne 关系：在 EntityA

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

在实体 B 中：

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

所以从EntityA到EntityB有一个CascadeType.ALL。我已经检查过我没有直接持久化 EntityB，我打印出日志，这些日志显示只有我正在查看的两个实体被持久化，并且 entityA 实例指向 entityB 实例，该实例指向正确的 entityA 实例（并且我可以从堆栈跟踪中看到持久性来自级联）。所以 entityB 由于来自 entityA 的级联而被持久化，现在 entityB 抱怨 entityA 是瞬态的？？？

有什么想法可以在这里出错吗？

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0 回答 0