我正在使用 Hibernate 4.1.0.Final 和 hibernate-jpa-2.0-api。我在使用实体管理器更新具有 OneToMany 关系的实体时遇到问题。这是实体:
@GenericGenerator(name = "uuid-strategy", strategy = "uuid.hex")
@Entity
@Table(name = "cb_organization", uniqueConstraints = {@UniqueConstraint(columnNames={"organization_id"})})
public class Organization implements Serializable
{
…
@OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.PERSIST)
@JoinTable(name = "cb_organization_address",
joinColumns = @JoinColumn(name = "organization_id"),
inverseJoinColumns = @JoinColumn(name = "address_id"))
private List<Address> addresses;
当我尝试使用新的一对多列表更新实体(使用实体管理器的合并方法)时,地址没有得到保存。我像这样创建列表...
List<Address> addresses = new ArrayList<Address>();
addresses.add(address);
...
org.setAddresses(addresses);
m_orgDao.save(org);
这是相关的DAO代码......
@Autowired
private EntityManager entityManager;
@Override
public Organization save(Organization organization)
{
if(StringUtils.isEmpty(organization.getId()))
{
entityManager.persist(organization);
}
else
{
organization = entityManager.merge(organization);
}
return organization;
}
返回的组织有一个地址,其中所有字段都为空。我可以对我的实体管理器和实体做些什么来确保数据正确保存?