org.hibernate.PersistentObjectException: detached entity passed to persist:
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困扰了两天的异常,原因是因为我在关系维护的时候的数据不是新数据
,是通过关系关联得来的。
导致最后update的时候 出现了org.hibernate.PersistentObjectException: detached entity passed to persist: 这个异常。
解决方法:在关系维护的时候判断一下,被维护的关系是否存在,如果存在就不维护,不存在的时候再去维护。
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