인프런 커뮤니티 질문&답변

[질문 템플릿]
1. 강의 내용과 관련된 질문인가요? (예/아니오) 네
2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오) 네
3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)

[질문 내용]
여기에 질문 내용을 남겨주세요.

member = Member(id=1, username=member1, age=10)

member.getTeam() = Team(id=1, name=teamA)

memberList = [Member(id=1, username=member1, age=10), Member(id=2, username=member2, age=20)]

member = Member(id=2, username=member2, age=20)

member.getTeam() = Team(id=1, name=teamA)

memberList = [Member(id=1, username=member1, age=10), Member(id=2, username=member2, age=20)]

member = Member(id=3, username=member3, age=30)

member.getTeam() = Team(id=1, name=teamA)

memberList = [Member(id=3, username=member3, age=30), Member(id=4, username=member4, age=40)]

member = Member(id=4, username=member4, age=40)

member.getTeam() = Team(id=1, name=teamA)

memberList = [Member(id=3, username=member3, age=30), Member(id=4, username=member4, age=40)]

이부분이 soutv 프린트결과입니다.

이부분부터 테스트코드인데요 여기서분명히 팀을 다르게넣어주었고 실제로 db에도 적용되어있습니다.

@Test
@DisplayName("entity test")
void entityTest() {
    Team team = new Team("teamA");
    Team teamB = new Team("teamB");
    em.persist(team);
    em.persist(teamB);

    Member member = new Member("member1",10,team);
    Member member1 = new Member("member2",20,team);
    Member member2 = new Member("member3",30,teamB);
    Member member3 = new Member("member4",40,teamB);
    em.persist(member);
    em.persist(member1);
    em.persist(member2);
    em.persist(member3);



    List<Member> members = em.createQuery("select m from Member m", Member.class).getResultList();
    for (Member memberList : members) {
        System.out.println("member = " + memberList);
        System.out.println("member.getTeam() = " + member.getTeam());
        System.out.println("memberList = " + memberList.getTeam().getMembers());
    }
    Assertions.assertThat(member.getTeam()).isEqualTo(team);
    Assertions.assertThat(member1.getTeam()).isEqualTo(team);
    Assertions.assertThat(member2.getTeam()).isEqualTo(teamB);
    Assertions.assertThat(member3.getTeam()).isEqualTo(teamB);



}

어떤게 문제인지모르겠어서 질문남깁니다!

entity code 도 남기겠습니다.

package study.datajpa.entity;


import jakarta.persistence.*;
import lombok.*;

@Entity
@Getter
@Setter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@ToString(of = {"id","username","age"})
public class Member {

    @Id
    @GeneratedValue
    @Column(name = "member_id")
    private Long id;

    private String username;

    private int age;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "team_id")
    private Team team;


    public Member(String username) {
        this.username = username;
    }

    public void memberTeamSetting(Team team) {
        if (this.team != null) {
            this.team.getMembers().remove(this);
        }
        this.team = team;
        team.getMembers().add(this);
    }

    public Member(String username, int age, Team team) {
        this.username = username;
        this.age = age;
        if(team != null) {
            memberTeamSetting(team);
        }
    }
}

package study.datajpa.entity;


import jakarta.persistence.*;
import lombok.*;

import java.util.ArrayList;
import java.util.List;

@Entity
@Getter
@Setter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@ToString(of = {"id","name"})
public class Team {

    @Id @GeneratedValue
    @Column(name = "team_id")
    private Long id;

    private String name;

    @OneToMany(mappedBy = "team")
    private List<Member> members = new ArrayList<>();


    public Team(String name) {
        this.name = name;
    }
}