JPA：插入后的数据表不显示@joincolumn @ManyToOne

我正在尝试使用JPA和JSF-primefaces的Web项目。我有插入/更新具有@ManyToOne关系的对象的错误。JPA：插入后的数据表不显示@joincolumn @ManyToOne

插入后，@JoinColumn是空白字段。（对不起ican't后的图像，这是图像链接）

，然后，重装后的名单，空白字段恢复正常

我使用的是单向@多对一实体

Place.java

@Entity 
@Table(name = "place") 
@XmlRootElement 

public class Place implements Serializable { 
    private static final long serialVersionUID = 1L; 
    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Basic(optional = false) 
    @Column(name = "id") 
    private Integer id; 
    ... 
    @Basic(optional = false) 
    @NotNull 
    @Column(name = "prefecture_id") 
    private int prefectureId; 

    @ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL) 
    @JoinColumn(name = "prefecture_id",referencedColumnName = "id", updatable = false,insertable = false) 
    private Aken prefecture;

Aken.java

@Entity 
@Table(name = "aken") 
@XmlRootElement 
public class Aken implements Serializable { 
    private static final long serialVersionUID = 1L; 
    @Id 
    @Basic(optional = false) 
    @NotNull 
    @Column(name = "id") 
    private Short id; 
    @Size(max = 50) 
    @Column(name = "data") 
    private String data;

到数据库的方法更新

@Stateless 
@TransactionManagement(TransactionManagementType.BEAN) 
public class PlaceFacade extends AbstractFacade<Place> { 
    @PersistenceContext(unitName = "JutenPU") 
    private EntityManager em; 

    @Resource 
    private UserTransaction userTransaction; 

    public void edit(Place place){ 
     try{ 
      getUserTransaction().begin(); 
      getEntityManager().merge(place); 
      getUserTransaction().commit(); 
      }catch(Exception e){ 
      System.out.println(e.getMessage()); 
      } 
     }

方法检索表数据

public List<Place> findAll() { 
    javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery(); 
    cq.select(cq.from(Place.class)); 
    return getEntityManager().createQuery(cq).getResultList(); 
}

我使用JAVA EE7，GlassFish服务器4，primefaces 4.0

感谢您的帮助

来源

2014-01-10 user1505714

@JoinColumn(name = "prefecture_id",referencedColumnName = "id", updatable = false,insertable = false)

您标记了放置外键列READONLY。

删除限制：@JoinColumn(name = "prefecture_id",referencedColumnName = "id")

来源

2014-01-10 08:25:16

JPA：插入后的数据表不显示@joincolumn @ManyToOne

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