JPA OrderBy in @OneToMany by external field

Question

I have entities:

@Entity
public class C {

 @Column
 private String name;

}


@Entity
public class B {

 @Column
 private Integer id;

 @ManyToOne
 @JoinColumn(name = "id_c")
 private C c;

}


@Entity
public class A {

 @OneToMany(mappedBy = "a")
 @OrderBy("id")
 private Set<B> itemsB;

}

Now when i access to A.itemsB() - items ordered by B.id

I need to get A.itemsB() ordered by C.name. Is this possible?

I tried to write something like @OrderBy("c.name") but it not work.

Answer 1

只需检查导入的 Order ： org.hibernate.annotations.OrderBy 或 javax.persistence.OrderBy .. 你应该使用第二个。

Answer 2

您不应使用“Set<B>”，而应使用“List<B>”。集合始终是无序的。