Which return value should I use for the one-to-one table when using spring boot jpa? - jpa

Question

We are working on a club management project.
There is a club president on the club table and the user ID is received as a foreign key.
I want to join two tables while using jpa and get the results
If you specify the mapped club table as a type, an error appears (image 1)
If you interface the resulting field, only null values are returned. (Image 2)
How shall I do it?
(Image1)
org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.Object[]] to type [#org.springframework.data.jpa.repository.Query com.wodongso.wodongso.entity.Society] for value '{호남대학교, 왕유저13, 두 발의 자유1, 스포츠, 두 바퀴만 있다면 지원가능!!1, 허벅지 터지도록 활동합니다1, true}'; nested exception is org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.lang.String] to type [#org.springframework.data.jpa.repository.Query com.wodongso.wodongso.entity.Society]
(Image2)
society entity
user entity
#Entity
#Data
public class User {
#Id
private String id;
private String name;
private String nickname;
private String password;
private String role;
private String contact;
#Column(name = "profile_url")
private String profileUrl;
private String region;
private String university;
private String major;
#Column(name = "class_of")
private Integer classOf;
private boolean enabled;
#Column(name = "created_at")
private Date createdAt;
}
SocietyRepository
#Repository
public interface SocietyRepository extends JpaRepository<Society, Integer> {
Page<Society> findByNameContaining(String searchKeyword, Pageable pageable);
#Query("SELECT s FROM Society s WHERE s.enabled = :isEnable")
Page<Society> findByEnabledPage(#Param("isEnable") boolean isEnable, Pageable pageable);
#Query("SELECT u.university, u.name, s.name, s.category, s.simpleDesc, s.detailDesc, s.enabled " +
"FROM Society s " +
"INNER join User u " +
"ON u.id = s.officerId " +
"WHERE u.university = :university")
List<Society> findAllByUniversity(#Param("university") String university);
}

Answer 1

Create a class which contains all the fields and add an all args constructor and than use the query:
#Query("SELECT new SocietyWithUser(u.university, u.name, s.name, s.category, s.simpleDesc, s.detailDesc, s.enabled) " +
"FROM Society s " +
"INNER join User u " +
"ON u.id = s.officerId " +
"WHERE u.university = :university")
List<SocietyWithUser> findAllByUniversity(#Param("university") String university);