Spring JPA query for many to many

Question

I have an entity User and System

@Entity
public class User {
    private Long id;
    private String name;
}

@Entity
public class System{
    private Long id;
    private Long SystemId;

    @ManyToMany
    private Set<User> users;
}

and one table created by hibernate legalhold_system

I want to get all the user related to System ID, I can fetch the same using below native query

select * from user where id in (select user_id from legalhold_system where system_id in(select id from system_user where system_id=:1))

How can I achieve the same with Spring JPA query, As I don't have legalhold_system entity present in Code?

Answer 1

如果只有这两个实体，则可以使用以下查询来实现：

SELECT s.users FROM System s WHERE s.systemId = :systemId