Question

我有两个实体

@Entity
@Table(name="one")
public class One implements Serializable {
  @Id
    @NotNull
    @Column(name = "id")
    private String id;

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

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

    @ManyToOne
    @JoinColumn(name = "three_id")
    private Three three;
}

@Entity
@Table(name="two")
public class Two implements Serializable {
    @Id
    @NotNull
    @Column(name = "id")
    private String id;

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

    @ManyToOne
    @JoinColumn(name = "three_id")
    private Three three;
}

@Entity
@Table(name="three")
public class Three implements Serializable {
  @Id
    @NotNull
    @Column(name = "id")
    private String id;

     @Column(name = "quantity")
    private String quantity;
}

并将命名查询作为 select o.name from one o, two tw, three th where tw.order="test" and o.three.id = tw.three.id;

部署此org.hibernate.HibernateException: Errors in named queries

时，Jboss会抛出以下错误

目的是我想要基于公共列three_id的两个表中的行，这是表＃34中的id字段;三个＆＃34; 为什么会失败，我该如何解决这个问题。

Answer 1

好吧，似乎你在查询中的任何地方都没有使用它，可能是问题。

这应该有效：

从一个o，两个tw中选择o.name，其中tw.order =＆＃34; test＆＃34;和o.three.id = tw.three.id;

在公共外键列

1 个答案: