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我正在使用Spring Data JPA 1.0.1。我定义了一个JPA存储库。我正在编写一个使用嵌入式数据库实现的集成测试。当我的服务类呼吁我的仓库 我得到下面的异常在spring数据jpa中实现JpaRepository接口的存储库能否返回排序集?
result returns more than one elements
at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:298)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:102)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:368)
at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:58)
at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:163)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy48.findMyEntities(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
这里是我的仓库实现
public interface MyRepository extends JpaRepository<MyEntity, Long> {
@Transactional(readOnly = true)
@Query("select e from MyEntity e where e.state= :state")
public SortedSet<MyEntity> findMyEntities(@Param("state") EntityState state);
}
是你的sql返回多个元素吗? – dimitrisli 2012-01-12 21:02:15
是的。我改变了接口方法findMyEntities返回一个列表并解决了这个问题。为了确保排序结果,我指定了一个Sort参数。 –
predhme
2012-01-12 22:18:38