java - JPA 查询集合中的 bean 字段

Question

我有下一个班级关系：

public class Company {
  . . .
  @OneToMany(mappedBy = "company", fetch = FetchType.EAGER, cascade=CascadeType.PERSIST)
  private Set<CompanySecUser> companySecUsers;
  . . .
}
public class CompanySecUser{
    . . .
    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="USER_ID")
    private User secUser;

    @Column(name = "IS_READ")
    private BigDecimal isRead;
    . . .
}

现在如何在公司实体的 JPA 中编写查询以仅获取具有指定 secUser.id 和 isRead = 1 的公司？

Answer 1

List<Company> list = session.createQuery("from Company company where company.companySecUsers.isRead=:isRead").setParameter("isRead",1).list();

Answer 2

select company from Company company 
    join company.companySecUsers user 
    where user.id = <ID> and user.isRead = 1