Question

我有A，B类

inSampleSize

现在我有一堆A类objs Set，我想查询数据库，以便在B类中包含相同的x和y（在这种情况下z比较重要）应该选择，我该怎么办实现那个？

它就像SQL中的“In”，但由于我在比较嵌入式对象，我该怎么做呢？非常感谢！！

Answer 1

鉴于课程：

public class RandomEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    @Embedded
    private EmbeddableEntity embedded;
}

和

@Embeddable
public class EmbeddableEntity {
    private Long valueA;
    private Long valueB;
}

您可以像下面这样查询：

session.createQuery( "select a from RandomEntity a where a.embedded.valueA=:value" ).setParameter( "value", 1L ).list();

Hibernate: select randomenti0_.id as id1_2_, randomenti0_.valueA as valueA2_2_, randomenti0_.valueB as valueB3_2_ from RandomEntity randomenti0_ where randomenti0_.valueA=?

或：

session.createQuery( "select a from RandomEntity a where a.embedded.valueA in (:value)" ).setParameterList( "value", Arrays.asList( 1L, 2L ) ).list();

Hibernate: select randomenti0_.id as id1_2_, randomenti0_.valueA as valueA2_2_, randomenti0_.valueB as valueB3_2_ from RandomEntity randomenti0_ where randomenti0_.valueA in (?)

如何在Hibernate中查询嵌入对象？

1 个答案: