Question

我有以下代码：

HashSet hashSet = new HashSet(); 
                     hashSet.addAll(partnerRepository.findByVatNumber(partner));
hashSet.addAll(etc...);

我收到以下异常：

org.springframework.dao.InvalidDataAccessApiUsageException: 
org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: enone.domain.PartnerEntity; nested exception is java.lang.IllegalStateException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: domain.PartnerEntity
        at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:381)
        at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:157)
        at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:417)
        at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59)
        at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
        at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:147)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodIntercceptor.invoke(CrudMethodMetadataPostProcessor.java:111)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
        at com.sun.proxy.$Proxy75.findByVatNumberExcludingPartner(Unknown Source)

我怀疑它可能需要对延迟加载做些什么？虽然它有点奇怪，因为我没有调用保存方法，只是将结果添加到哈希集。

说明

Answer 1

事实证明，问题根本与实际的HashSet无关，而是与存储库有关。

我没有比较合作伙伴的ID，而是将合作伙伴与合作伙伴进行比较。 partnerEntity虽然具有懒惰加载的字段，另外还有来自另一个会话/查询的字段。

我取而代之：

@Query("select p from PartnerEntity p where p.country = ?1 AND NOT p.id = ?2")
    List<PartnerEntity> findByCountryNameExcludingPartner(CountryEntity country, PartnerEntity partnerEntity);

有了这个：

@Query("select p from PartnerEntity p where p.country = ?1 AND NOT p.id = ?2")
List<PartnerEntity> findByCountryNameExcludingPartner(CountryEntity country, Integer partnerEntity);

现在它正在发挥作用。我也在通话中发送partnerEntity.getId()而不是整个实体。

HashSet.addAll（来自存储库查询的列表）导致InvalidDataAccessApiUsageException

1 个答案: