댓글 테이블 생성

package shop.mtcoding.blog.reply;

import jakarta.persistence.*;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.hibernate.annotations.CreationTimestamp;
import shop.mtcoding.blog.board.Board;
import shop.mtcoding.blog.user.User;

import java.sql.Timestamp;

@NoArgsConstructor
@Data
@Table(name = "reply_tb")
@Entity
public class Reply {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    private String comment;

    @ManyToOne(fetch = FetchType.LAZY)
    private User user;

    @ManyToOne(fetch = FetchType.LAZY)
    private Board board;

    @CreationTimestamp // insert 될 때 날짜를 자동으로 넣어준다.
    private Timestamp createdAt;

    @Builder
    public Reply(Integer id, String comment, User user, Board board, Timestamp createdAt) {
        this.id = id;
        this.comment = comment;
        this.user = user;
        this.board = board;
        this.createdAt = createdAt;
    }
}

더미넣기

insert into reply_tb(comment, board_id, user_id, created_at) values('댓글2', 4, 1, now());
insert into reply_tb(comment, board_id, user_id, created_at) values('댓글3', 4, 1, now());
insert into reply_tb(comment, board_id, user_id, created_at) values('댓글4', 4, 2, now());
insert into reply_tb(comment, board_id, user_id, created_at) values('댓글1', 3, 2, now());