java - CrudRepository 保存方法不返回更新后的实体

Question

我正在使用 Spring 并在其中 spring-data-jpa:1.7.0.RELEASE 和 hibernate-jpa-2.1-api:1.0.0.Final。我的数据库是MySQL。在集成测试中，当我保存一个实体时，entityRepository.save() 方法不会返回它的更新版本(例如填充了自动递增的 id)，因此我可以看到它在数据库中。

这是我的配置类:

//@EnableTransactionManagement
@EnableJpaRepositories(basePackages = "core.repository")
@Configuration
@PropertySource("classpath:application.properties")
public class JPAConfiguration {

    @Autowired
    private Environment env;

    private
    @Value("${db.driverClassName}")
    String driverClassName;
    private
    @Value("${db.url}")
    String url;
    private
    @Value("${db.username}")
    String user;
    private
    @Value("${db.password}")
    String password;

    @Bean
    public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
        return new PropertySourcesPlaceholderConfigurer();

    }

    @Bean
    public DataSource dataSource() {

        DriverManagerDataSource dataSource = new DriverManagerDataSource();

        dataSource.setDriverClassName(driverClassName);
        dataSource.setUrl(url);
        dataSource.setUsername(user);
        dataSource.setPassword(password);
        return dataSource;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {

        HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
        vendorAdapter.setGenerateDdl(true);
        vendorAdapter.setDatabasePlatform(env.getProperty("hibernate.dialect"));

        final LocalContainerEntityManagerFactoryBean em =
                new LocalContainerEntityManagerFactoryBean();

        em.setJpaVendorAdapter(vendorAdapter);
        em.setPackagesToScan(new String[]{"core.persistence"});
        em.setDataSource(dataSource());
        em.afterPropertiesSet();


        return em;
    }

    @Bean
    public EntityManager entityManager(EntityManagerFactory entityManagerFactory) {
        return entityManagerFactory.createEntityManager();
    }

    @Bean
    public JpaTransactionManager transactionManager(final EntityManagerFactory emf) {
        final JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(emf);
        return transactionManager;
    }

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

这是我的测试类:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = {JPAConfiguration.class})
//@Transactional
//@TransactionConfiguration(defaultRollback = true)
public class AgencyRepositoryIntegrationTests {

    @Autowired
    AgencyRepository agencyRepository;

    @Test
    public void testThatAgencyIsSavedIntoRepoWorks() throws Exception {

        Agency c = DomainTestData.getAgency();
        Agency d = agencyRepository.save(c);
        // here d equals to c but both have id 0.

        Collection<Agency> results = Lists.newArrayList(agencyRepository.findAll());
        //here results != null and it does contain the agency object.
        assertNotNull(results);
    }
}

由于研究了 stackoverflow 中的其他问题，我最终评论了 Transactional 注释(在测试和配置类中)，但它没有用。

谢谢

Answer 1

尝试取消注释您的@Transactional 注释并运行。我在你的代码片段中看不到任何明显的问题，但我内心有一些东西(这不是饥饿)说你的事务划分不正确。我以前遇到过类似的问题，只是缺少@transaction 注释或事务配置错误。