object references an unsaved transient instance - save the transient instance before flushing

最新推荐文章于 2024-04-02 15:52:59 发布

原创最新推荐文章于 2024-04-02 15:52:59 发布 · 4k 阅读

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#object #exception #thread

本文介绍了解决Hibernate框架中出现的TransientObjectException异常的方法。该异常通常发生在尝试引用未保存的对象实例时。解决方案包括在会话中保存所有相关对象或在映射文件中指定级联操作。

org.hibernate.TransientObjectException: object references an unsaved transient instance

Solution

Either use session.save for both objects or specify a cascade="save-update,persist" in your mapping.

Exception Message

Exception in thread "main" org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: de.laliluna.cascade1.Dog
at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:216)
at org.hibernate.type.EntityType.getIdentifier(EntityType.java:108)
at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:221)
at org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:476)
at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:2803)
at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:467)
at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:190)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:113)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:195)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:980)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:353)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at test.de.laliluna.mis.TestCascadeExample.testCascade1b(TestCascadeExample.java:76)