Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: Multiple representations of the same entity解决方法

1、错误信息
Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: Multiple representations of the same entity
2、错误原因

因为试图给 某一个new 的Transient对象 的某一个属性赋一个 已经Persistent 对象或者Detached 对象值。导致最后save 或者merge 这个Transient对象报这个错误。

3、解决方案

这应该算是Hibernate 自身的一个bug ,已经在4.2.15版本中解决了

1、更新hibernate版本到4.2.15 以上

2、在hibernate的配置文件中添加如下属性：

<property name="hibernate.event.merge.entity_copy_observer">allow</property>

如果使用的Spring 管理hibernate， 在你的spring的数据源中配置

<prop key="hibernate.event.merge.entity_copy_observer">allow</prop>

具体参考：http://thinerzq.me/2016/02/01/Multiple-representations-of-the-same-entity-are-being-merged%E8%A7%A3%E5%86%B3%E6%96%B9%E6%B3%95/

　　

时间： 2024-12-12 18:59:35

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