인프런 커뮤니티 질문&답변

Member.class

package dev.devpool.domain;

import javax.persistence.*;
import java.util.ArrayList;
import java.util.List;

@Entity
public class Member {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "MEMBER_ID")
    private long id;

    @OneToMany(mappedBy = "member", cascade = CascadeType.ALL)
    List<Child> children = new ArrayList<>();

    public List<Child> getChildren() {
        return children;
    }

    public void setChildren(List<Child> children) {
        this.children = children;
    }

    private String name;
    private String nickName;
    private String email;
    private String password;

    public Member() {
    }

    public Member(String name, String nickName, String email, String password) {
        this.name = name;
        this.nickName = nickName;
        this.email = email;
        this.password = password;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public void setName(String name) {
        this.name = name;
    }


    public String getName() {
        return name;
    }
    public String getNickName() {
        return nickName;
    }

    public void setNickName(String nickName) {
        this.nickName = nickName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

Child.class

package dev.devpool.domain;


import javax.persistence.*;

@Entity
public class Child {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long id;

    @ManyToOne
    @JoinColumn(name = "MEMBER_ID")
    private Member member;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public Member getMember() {
        return member;
    }

    public void setMember(Member member) {
        this.member = member;
    }
}

로 부모를 Member 자식을 Child로 만들고 delete 시 cascade가 적용되는지를 체크하려 하였습니다.

MemberRepository에서 delete 쿼리를 아래와 같이 작성하였습니다.

Test 코드는 아래와 같습니다.

@Test
public void ss() {

    Member member = new Member();
    member.setName("김우");
    member.setEmail("rereers15@naver.com");
    member.setPassword("taeu4");
    member.setNickName("귀요미");

    Child child = new Child();
    child.setMember(member);

    member.getChildren().add(child);

    memberService.join(member);

    em.flush();
    em.clear();

    System.out.println("================");
    memberService.delete(member.getId());
    System.out.println("================");

}

SQL

 하지만 em.remove 부분이 동작하지 않습니다.

이유가 무엇인가요?

** save메서드에서 저장 후 remove()를 하는 것을 실험해보았는데 이 경우는 delete 쿼리까지 정상 출력됩니다.

영속성 컨텍스트와 @Transaction과 관련된 이슈인 것같은데 이와 관련해서 설명해주시면 감사하겠습니다.