spring - org.hibernate.PersistentObjectException : detached entity passed to persist with H2 in memory database

Question

我在内存数据库中使用 H2 进行测试，我的配置如下:

1- SpringTestingConfig:

@Configuration
@ComponentScan(basePackages = "com.myapp.data", excludeFilters = { @Filter(Configuration.class) })
@PropertySource("classpath:/test.properties")
@Profile("test")
public class SpringTestingConfig {
   @Bean
   public DataSource dataSource() {
      DriverManagerDataSource dataSource = new DriverManagerDataSource();
      dataSource.setDriverClassName("org.h2.Driver");
      dataSource.setUrl("jdbc:h2:mem:test;MODE=Mysql;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;INIT=CREATE SCHEMA IF NOT EXISTS MYAPP");
      dataSource.setUsername("sa");
      dataSource.setPassword("");
      return dataSource;
   }
}

2- MyTestClass:

@RunWith(SpringJUnit4ClassRunner.class)
@TestExecutionListeners({ WebContextTestExecutionListener.class,
        DependencyInjectionTestExecutionListener.class,
        DirtiesContextTestExecutionListener.class,
        TransactionalTestExecutionListener.class })
@ActiveProfiles("test")
@DirtiesContext
@ContextConfiguration(loader = AnnotationConfigContextLoader.class, classes = {
        SpringConfig.class, SpringTestingConfig.class,
        SpringLocalContainerJPAConfig.class, CustomConfiguration.class })
@PrepareForTest({ FacesContext.class })
@PowerMockIgnore({ "javax.management.*", "javax.xml.parsers.*",
    "com.sun.org.apache.xerces.internal.jaxp.*", "ch.qos.logback.*",
    "org.slf4j.*" })
public class MyTestClass{

   private Company company;
   private User user;


   @Test
    public void signup(){

       User user = new User();
    Company company = new Company();
    company.setName("Test");
    company = usService.saveCompany(company);
    user.setFirstName("Test");
    user.setLastName("User");
    user.setEmail("test@test.com");
    user.setPassword("verySecret");
    user.setCompany(company);
    user = usService.saveUser(user); // gives exception

   }

} 

3- 保存方法:

@Transactional(propagation = Propagation.REQUIRED)
    public User saveUser(User user) {
        return userRepository.saveAndFlush(user); //JpaRepository
    }

@Transactional(propagation = Propagation.REQUIRED)
    public Company saveCompany(Company company) {
        return companyRepository.saveAndFlush(company); //JpaRepository
    }

4- JPA 配置

@Configuration
@EnableSpringConfigured
public class SpringJNDIJPAConfig {
protected static final Logger logger = LoggerFactory.getLogger(SpringConfig.class);
protected static final String HIBERNATE_TRANSACTION_JTA_PLATFORM = "hibernate.transaction.jta.platform";

@Value("${hibernate.naming_strategy:org.hibernate.cfg.DefaultNamingStrategy}")
private String namingStrategy;

@Value("${hibernate.packages_to_scan:com.myapp.data.domain}")
private String packagesToScan;

@Value("${spring_config.project_name}")
private String projectName;

@Value("${hibernate.show_sql:false}")
private String showSql;

@Value("${hibernate.hbm2ddl.auto:update}")
private String hbm2ddlAuto;

@Value("${hibernate.format_sql:false}")
private String formatSql;

@Value("${hibernate.dialect:org.hibernate.dialect.MySQL5InnoDBDialect}")
private String hibernateDialect;

@Value("${hibernate.connection.useUnicode:true}")
private String useUnicode;

@Value("${hibernate.connection.characterEncoding:UTF-8}")
private String characterEncoding;

@Value("${hibernate.charSet:UTF-8}")
private String charSet;

@Value("${hibernate.default_schema}")
private String defaultSchema;

@Value("${hibernate.use_default_schema:true}")
private boolean useDefaultSchema;

@Value("${hibernate.use_sql_comments:true}")
private String useSqlComments;

@Autowired
private ApplicationContext applicationContext;

@Autowired
private DataSource dataSource;

@Bean
public HibernateExceptionTranslator hibernateExceptionTranslator() {
  return new HibernateExceptionTranslator();
}

@Bean
protected EntityManagerFactory entityManagerFactory() {
  LocalContainerEntityManagerFactoryBean bean = new LocalContainerEntityManagerFactoryBean();

  JtaPersistenceUnitManager puManager = new JtaPersistenceUnitManager();
  Map<String, DataSource> dataSources = new HashMap<String, DataSource>();
  dataSources.put("dataSource", dataSource);
  puManager.setDataSourceLookup(new MapDataSourceLookup(dataSources));
  puManager.setDefaultDataSource(dataSource);
  puManager.setPackagesToScan(packagesToScan());
  bean.setPersistenceUnitManager(puManager);

  bean.setPersistenceProviderClass(HibernatePersistence.class);
  bean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());

  Properties jpaProperties = getHibernateProperties();
  jpaProperties.put(HIBERNATE_TRANSACTION_JTA_PLATFORM, SpringJtaPlatform.class.getName().toString());
  bean.setJpaProperties(jpaProperties);

  puManager.afterPropertiesSet();
  bean.afterPropertiesSet();
  return bean.getObject();
}

protected String getDefaultSchema() {
  String ds = ConfigurationUtil.config().getString("db.schema.name");
  if (ds != null) defaultSchema = ds;
  return defaultSchema;
}

protected String getUseUnicode() {
      return useUnicode;
}

protected String getCharacterEncoding() {
      return characterEncoding;
}

protected String getCharSet() {
      return charSet;
}

protected String getFormatSql() {
  return formatSql;
}

protected String getHbm2ddlAuto() {
  return hbm2ddlAuto;
}

protected String getHibernateDialect() {
  return hibernateDialect;
}

protected Properties getHibernateProperties() {
  Properties properties = new Properties();
  properties.put("hibernate.dialect", getHibernateDialect());
  properties.put("hibernate.hbm2ddl.auto", getHbm2ddlAuto());
  properties.put("hibernate.show_sql", getShowSql());
  properties.put("hibernate.use_sql_comments", getUseSqlComments());
  properties.put("hibernate.format_sql", getFormatSql());
  if(useDefaultSchema) {
     properties.put("hibernate.default_schema", getDefaultSchema());
  }
  //properties.put("hibernate.ejb.naming_strategy", namingStrategy);
  properties.put("hibernate.hbm2ddl.import_files", "/import.sql");
  //properties.put("hibernate.connection.characterEncoding", getCharacterEncoding());
  //properties.put("hibernate.connection.charSet", getCharSet());
  //properties.put("hibernate.connection.useUnicode", getUseUnicode());
  if(logger.isInfoEnabled()) {
     logger.info(MessageFormat.format("SET HIBERNATE PROPERTIES: {0}", properties.toString()));
  }
  return properties;
}

protected String getProjectName() {
  return projectName;
}

protected String getShowSql() {
  return showSql;
}

protected String getUseSqlComments() {
  return useSqlComments;
}

protected String packagesToScan() {
      return packagesToScan;
   }

@Bean
protected JtaTransactionManager transactionManager() {
  SpringBeanFactory.setApplicationContext(applicationContext);
  JtaTransactionManager manager = new JtaTransactionManager();
  manager.setTransactionManagerName("java:jboss/TransactionManager");
  manager.setUserTransactionName("java:jboss/UserTransaction");
  manager.afterPropertiesSet();
  return manager;
}

}

5- 用户实体:

@Entity
@Table(name = "User", uniqueConstraints = { @UniqueConstraint(columnNames = {
        "CompanyGID", "MPath" }) })
public class User extends PersistableEntity implements UserDetails {
    /**
     * 
     */
    private static final long serialVersionUID = -6520416613985790209L;

    @ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    @JoinColumn(name = "CompanyGID")
    private Company company;

问题:当在 Jboss 上运行应用程序(本地数据库)并从支持 bean 方法调用代码时，测试方法中的代码工作得非常好，但是当从测试(在内存数据库中)运行它时，它可以节省公司，而在尝试保存用户时，它会给出异常(exception):

    org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: com.myapp.data.domain.Company; nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: com.myapp.data.domain.Company
    at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:668)
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:106)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:403)
    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.data.jpa.repository.support.LockModeRepositoryPostProcessor$LockModePopulatingMethodIntercceptor.invoke(LockModeRepositoryPostProcessor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at com.myapp.service.UserService.saveUser_aroundBody6(UserService.java:98)
    at com.myapp.service.UserService$AjcClosure7.run(UserService.java:1)
    at org.springframework.transaction.aspectj.AbstractTransactionAspect.ajc$around$org_springframework_transaction_aspectj_AbstractTransactionAspect$1$2a73e96cproceed(AbstractTransactionAspect.aj:59)
    at org.springframework.transaction.aspectj.AbstractTransactionAspect$AbstractTransactionAspect$1.proceedWithInvocation(AbstractTransactionAspect.aj:65)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
    at org.springframework.transaction.aspectj.AbstractTransactionAspect.ajc$around$org_springframework_transaction_aspectj_AbstractTransactionAspect$1$2a73e96c(AbstractTransactionAspect.aj:63)
    at com.myapp.service.UserService.saveUser(UserService.java:93)
    at com.myapp.service.UserService$$FastClassByCGLIB$$697e2a1b.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
    at com.myapp.service.UserService$$EnhancerByCGLIB$$abc2864a.saveUser(<generated>)
    at test.myapp.web.controllers.SignUpBeanTest.testSignUp(SignUpBeanTest.java:126)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
    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.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
    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.PersistentObjectException: detached entity passed to persist: com.myapp.data.domain.Company
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:141)
    at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:842)
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:835)
    at org.hibernate.ejb.engine.spi.EJB3CascadingAction$1.cascade(EJB3CascadingAction.java:53)
    at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:387)
    at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:330)
    at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:208)
    at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:165)
    at org.hibernate.event.internal.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:424)
    at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:263)
    at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:192)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:135)
    at org.hibernate.ejb.event.EJB3PersistEventListener.saveWithGeneratedId(EJB3PersistEventListener.java:78)
    at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:208)
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:151)
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:78)
    at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:852)
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:826)
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:830)
    at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:875)
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:241)
    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:354)
    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.saveAndFlush(SimpleJpaRepository.java:368)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:333)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:318)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155)
    ... 38 more

Answer 1

我认为问题出在这里:

 @Test
    public void signup(){

    User user = new User();
    Company company = new Company();
    company.setName("Test");
    company = usService.saveCompany(company); //object is saved and transaction is closed, so company is detached here. 
    user.setFirstName("Test");
    user.setLastName("User");
    user.setEmail("test@test.com");
    user.setPassword("verySecret");
    user.setCompany(company); //u are setting this detached object to user, NOTE user object's company attr is cascade.all which means this company will be saved as well when you save user. 
    user = usService.saveUser(user); // gives exception, because you are saving new user object with detached company object. 

   }

那么我们如何解决呢？
您可以让用户保存公司对象，因此您不必显式保存公司，因为用户中的公司对象的cascade.all 处于启用状态，因此在保存用户时也应保存公司:

@Test
    public void signup(){

    User user = new User();
    Company company = new Company();
    company.setName("Test");
    user.setFirstName("Test");
    user.setLastName("User");
    user.setEmail("test@test.com");
    user.setPassword("verySecret");
    user.setCompany(company);
    user = usService.saveUser(user); // gives exception

   }