加载测试时遇到问题：
@PersistenceContext
private EntityManager manager;
@Test
@Transactional
public void testService() {
VideoDvd dvd1 = new VideoDvd("Hell Boy", "horror", 15L);
VideoDvd dvd2 = new VideoDvd("Bonby", "anime", 10L);
VideoDvd dvd3 = new VideoDvd("Riddick", "action", 20L);
VideoDvd dvd4 = new VideoDvd("Butterfly effect", "sci-fi", 5L);
VideoDvd dvd5 = new VideoDvd("Cowboy", "western", 10L);
VideoDvd dvd6 = new VideoDvd("Hell Jigsaw", "horror", 15L);
Customer customer = new Customer("hichem");
manager.persist(dvd1);
manager.persist(dvd2);
manager.persist(dvd3);
manager.persist(dvd4);
manager.persist(dvd5);
manager.persist(dvd6);
manager.persist(customer);
manager.flush();
manager.clear();
customer.addDvd(dvd1);
customer.addDvd(dvd2);
customer.addDvd(dvd3);
customer.addDvd(dvd4);
customer.addDvd(dvd5);
customer.addDvd(dvd6);
manager.persist(customer);
assertEquals(Long.valueOf(75L), service.calculateRentDvDOwner(customer));
}
关于实体：我们有Customer和VideoDvd（并且每个人都有 @ManyToMany 关系，这意味着客户可以租多部电影，电影可以由很多客户租用）， 对于表连接我有这个： 对于客户实体：
@ManyToMany(fetch=FetchType.LAZY)
@JoinTable(name="storage",
joinColumns=@JoinColumn(name="custumer_id"),
inverseJoinColumns=@JoinColumn(name="dvd_id"))
private List<VideoDvd> dvdsRent = new ArrayList<VideoDvd>();
PS。：为VideoDvd实体做了同样的事情
堆栈错误在那里：
javax.persistence.PersistenceException: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1214)
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1147)
at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:255)
at org.video.store.dao.impl.VideoDvdDaoImpl.findDvdsRentByCustomer(VideoDvdDaoImpl.java:128)
at org.video.store.services.impl.VideoStoreServiceImpl.calculateRentDvDOwner(VideoStoreServiceImpl.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
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)
at com.sun.proxy.$Proxy29.calculateRentDvDOwner(Unknown Source)
at org.video.store.test.VideoStoreServiceTests.testService(VideoStoreServiceTests.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:96)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:268)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:187)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:64)
at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:1185)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1261)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:246)
... 42 more
**Caused by: org.h2.jdbc.JdbcBatchUpdateException: NULL not allowed for column "CUSTOMER_ID"; SQL statement**:
insert into storage (custumer_id, dvd_id) values (?, ?) [23502-156]
at org.h2.jdbc.JdbcPreparedStatement.executeBatch(JdbcPreparedStatement.java:1107)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268)
... 50 more