我有一个名称为"Pstn"的表,并且有用户表。用户不必使用 Pstn 表。但是有些用户可以使用它。因此,如果一个 pstn 有一个用户,我们想看看谁是。如何配置休眠注释?
pstnBbkTable.setVisibleColumns(new Object[]{"pstn", "bbk", "user.firstName", "inReserve", "creationDate", "expireDate", "button"});
java.lang.IllegalArgumentException:Id 必须存在于容器中或作为生成的列存在,缺少 id:user.firstName at com.vaadin.ui.Table.setVisibleColumns(Table.java:691(
用户表:
@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 表:
@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
******我像上面一样替换了 pstn bean 字段。我认为这是因为FetchType.EAGER-Lazy而发生的。
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "user_Id")
private User owner;
我像上面一样替换了 pstn bean 字段。我认为这是因为FetchType.EAGER-Lazy而发生的。
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "user_Id")
private User owner;