我有一个简单的测试，我试图更新对象，但合并似乎是执行插入而不是更新 .
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:spring/app-context.xml","classpath:spring/testdb-context.xml"})
public class UserJPATest {
@Test
public void testUpdate() throws Exception {
System.out.println("update");
User entity = ObjectManager.USER_DAO.findById(3L);
entity.setUsername("harryUpdate");
ObjectManager.USER_DAO.update(entity);
User selEntity = ObjectManager.USER_DAO.findById(3L);
Assert.assertEquals(entity.getUsername(),selEntity.getUsername());
}
}
这是我的更新方法
@Override
@Transactional(propagation= Propagation.REQUIRES_NEW)
public T update(T entity) throws Exception {
try {
T merged = entityManager.merge(entity);
return merged;
} catch (Exception e) {
e.printStackTrace();
throw new Exception(e);
}
}
更新代码
@Override
@Transactional(propagation= Propagation.REQUIRES_NEW)
public T update(T entity) throws Exception {
try {
T merged = null;
BaseEntity baseEntity = null;
if(entity instanceof BaseEntity){
baseEntity = (BaseEntity)entity;
merged = entityManager.find(entityClass, baseEntity.getId());
}
merged = entityManager.merge(entity);
entityManager.flush();
return merged;
} catch (Exception e) {
e.printStackTrace();
throw new Exception(e);
}
}
现在我收到以下错误无法提交JPA事务;嵌套异常是javax.persistence.RollbackException：标记为rollbackOnly的事务
1 回答
我有一个版本列，当种子数据插入数据库时没有设置 . 因此更新和删除所有问题