EFUB 백엔드 세션 4주차 과제

Spring으로 커뮤니티 기능 중 회원(member) 생성, 조회, 수정, 삭제 기능을 구현하기


ex) 멤버 조회

---

문제점

위의 예시처럼 4개 필드만 보고 싶은데, 조회 시 응답에 memberId 필드가 포함된다.

• 초기 MemberResponseDto.java 코드

@Getter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
public class MemberResponseDto {
    private Long memberId;
    private String email;
    private String nickname;
    private String university;
    private String studentId;

    public MemberResponseDto(Long memberId, String email, String nickname, String university, String studentId){
        this.memberId = memberId;
        this.email = email;
        this.nickname = nickname;
        this.university = university;
        this.studentId = studentId;
    }

    public static MemberResponseDto from(Member member){
        return new MemberResponseDto(
                member.getMemberId(),
                member.getEmail(),
                member.getNickname(),
                member.getUniversity(),
                member.getStudentId());
    }
}

---

해결 방법

1. 필드와 생성자에서 memberId 삭제

가장 간단하다.

@Getter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
public class MemberResponseDto {
    private String email;
    private String nickname;
    private String university;
    private String studentId;
    
    public MemberResponseDto(String email, String nickname, String university, String studentId){
        this.email = email;
        this.nickname = nickname;
        this.university = university;
        this.studentId = studentId;
    }

    public static MemberResponseDto from(Member member){
        return new MemberResponseDto(
                member.getEmail(),
                member.getNickname(),
                member.getUniversity(),
                member.getStudentId());
    }
}

2. 어노테이션 이용

생성자에서 memberId를 삭제하고,
@JsonInclude(JsonInclude.Include.NON_NULL)를 추가해준다.

@Getter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@JsonInclude(JsonInclude.Include.NON_NULL)
public class MemberResponseDto {
    private Long memberId;  //필드에서는 삭제하지 않음
    private String email;
    private String nickname;
    private String university;
    private String studentId;

    public MemberResponseDto(String email, String nickname, String university, String studentId){
        this.email = email;
        this.nickname = nickname;
        this.university = university;
        this.studentId = studentId;
    }

    public static MemberResponseDto from(Member member){
        return new MemberResponseDto(
                member.getEmail(),
                member.getNickname(),
                member.getUniversity(),
                member.getStudentId());
    }
}

어노테이션을 추가하지 않으면
memberId 필드가 제외되는 것이 아니라

"memberId" : null, ...

null로 출력된다.

따라서 null값을 갖는 필드를 제외하는 어노테이션을 추가해주었다.

---

성공!