在连接表上Hibernate NOT IN子查询

Question

我正在尝试在hibernate中执行查询,如下面的sql查询:

SELECT phone.* FROM phone WHERE phone.id NOT IN (SELECT phone_id FROM user_phone)

我有以下实体类:

@Entity
class User {
    @Id
    private Integer id;

    @ManyToMany
    private Set<Phone> phoneList;

}

和电话类:

@Entity
class Phone {

    @Id
    private Integer id;

    private String description;

}

Hibernate自动创建一个名为user_phone的联结表.现在我想选择所有未被任何用户使用的手机.我只是想弄清楚如何用Hibernate做到这一点.我曾尝试过以下方法:

Session session = (Session) entityManager.getDelegate();
Criteria criteria = session.createCriteria(Phone.class);

DetachedCriteria subCriteria = DetachedCriteria.forClass(User.class);
subCriteria.setProjection(Property.forName("phoneList"));

criteria.add(Subqueries.propertyNotIn("id", subCriteria))

但是,这会返回id与任何手机的ID不同的所有用户.所以这不是我想要的.

有人知道怎么做吗？

Answer 1

Criteria criteria = session.createCriteria(Phone.class)
    .add(Subqueries.propertyNotIn("id", DetachedCriteria.forClass(User.class)
        .createAlias("phoneList", "phone")
        .setProjection(Property.forName("phone.id"))
    ));