[JPA] column 가져다 쓰기

package stduy.datajpa.entity;

import lombok.*;

import javax.persistence.*;

@Entity
@Getter
@Setter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@ToString(of = {"id", "username", "age"})
@NamedQuery(
        name="Member.findByUsername",
        query="select m from Member m where m.username = :username"
)
@NamedEntityGraph(name="Member.all", attributeNodes = @NamedAttributeNode("team"))

public class Member extends JpaBaseEntity{
    @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 name) {
        this.username = name;
    }

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

    public Member(String name, int age) {
        this.username = name;
        this.age = age;

    }

    public void changeTeam(Team team) {
        this.team = team;
        team.getMembers().add(this);
    }


}

@MappedSuperclass
public class JpaBaseEntity {
    @Column(updatable = false)
    private LocalDateTime createdDate;
    private LocalDateTime updatedDate;

    @PrePersist
    public void prePersist() {
        LocalDateTime now = LocalDateTime.now();
        createdDate = now;
        updatedDate = now;
    }
    @PreUpdate
    public void preUpdate() {
        updatedDate = LocalDateTime.now();
    }
}

가져다 쓸 Column이 작성된 class에는 @MappedSuperclass를 붙여주고

가져다 쓸곳인 엔티티에는 해당 class를 상속받아면된다.

public class Member extends JpaBaseEntity{