如何配置基于休眠注释的关系？

Question

我有一个 table，名字是 "Pstn"，还有一个用户 table。用户不必使用 Pstn table。但是有些用户可以使用它。因此，如果 pstn 有一个用户，我们想看看是谁。我如何配置休眠注释？

 pstnBbkTable.setVisibleColumns(new Object[]{"pstn", "bbk", "user.firstName", "inReserve", "creationDate", "expireDate", "button"});

java.lang.IllegalArgumentException: ID 必须存在于 Container 中或作为生成的列，缺少 id: user.firstName 在 com.vaadin.ui.Table.setVisibleColumns(Table.java:691)

用户table：

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "user_Id")
    private long userId;

    @Column(name = "username", nullable = false)
    private String username;

    @Column(name = "password", nullable = false)
    private String password;

    @Column(name = "first_name", nullable = false)
    private String firstName;

    @Column(name = "last_name", nullable = false)
    private String lastName;

Pstn Table:

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "pstn_Id")
    private long pstnId;

    @Column(name = "pstn")
    private String pstn;

    @Column(name = "bbk")
    private String bbk;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "user_Id")
    private User user;

********************* 更新的解决方案 ****************

我像上面那样替换了 pstn bean 字段。我认为这是因为 FetchType.EAGER-Lazy..

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "user_Id")
    private User owner;

Answer 1

我像上面那样替换了 pstn bean 字段。我认为这是因为 FetchType.EAGER-Lazy..

@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "user_Id")
private User owner;

如何配置基于休眠注释的关系？

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java

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vaadin7