62. 댓글 쓰기

박선규

Mar 25, 2024

댓글쓰기 view

📌

댓글 작성은 댓글 내용만 받으면 된다. 하지만 작성시 게시글의 번호도 함께 받아야 하기 때문에 input 태그에서 hidden 으로 id 값을 같이 받는다.

댓글 쓰기 DTO 만들기


package shop.mtcoding.blog.reply;

import lombok.Data;
import shop.mtcoding.blog.board.Board;
import shop.mtcoding.blog.user.User;

public class ReplyRequest {

    @Data
    public static class SaveDTO {
        private Integer boardId;
        private String comment;

        public Reply toEntity(User sessionUser, Board board){
            return Reply.builder()
                    .comment(comment)
                    .board(board)
                    .user(sessionUser)
                    .build();
        }
    }
}

📌

영속성 컨텍스트로 INSERT 를 할 때는 엔티티 타입만 가능하기 때문에 DTO를 통해 받은 데이터도 엔티티로 만들어 INSERT 한다.

댓글쓰기 인터셉터 설정 (대신 권한체크 해주기)

ReplyJPARepository


public interface ReplyJPARepository extends JpaRepository<Reply,Integer> {}

ReplyService (정방향 insert)


package shop.mtcoding.blog.reply;

import jakarta.persistence.Transient;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import shop.mtcoding.blog._core.erros.exception.Exception404;
import shop.mtcoding.blog.board.Board;
import shop.mtcoding.blog.board.BoardJPARepository;
import shop.mtcoding.blog.user.User;

@RequiredArgsConstructor
@Service
public class ReplyService {
    private final BoardJPARepository boardJPARepository;
    private final ReplyJPARepository replyJPARepository;

    @Transactional
    public void 댓글쓰기(ReplyRequest.SaveDTO reqDTO, User sessionUser) {
        Board board = boardJPARepository.findById(reqDTO.getBoardId())
                .orElseThrow(() -> new Exception404("없는 게시글에 댓글을 작성할 수 없어요"));

        Reply reply = reqDTO.toEntity(sessionUser, board);

        replyJPARepository.save(reply);
    }
}

ReplyController


package shop.mtcoding.blog.reply;


import jakarta.servlet.http.HttpSession;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import shop.mtcoding.blog.user.User;

@RequiredArgsConstructor
@Controller
public class ReplyController {
    private final ReplyService replyService;
    private final HttpSession session;


    @PostMapping("/reply/save")
    public String save(ReplyRequest.SaveDTO reqDTO){
        User sessionUser = (User) session.getAttribute("sessionUser");
        replyService.댓글쓰기(reqDTO, sessionUser);
        return "redirect:/board/"+reqDTO.getBoardId();
    }
}

package shop.mtcoding.blog.reply; import lombok.Data; import shop.mtcoding.blog.board.Board; import shop.mtcoding.blog.user.User; public class ReplyRequest { @Data public static class SaveDTO { private Integer boardId; private String comment; public Reply toEntity(User sessionUser, Board board){ return Reply.builder() .comment(comment) .board(board) .user(sessionUser) .build(); } } }

package shop.mtcoding.blog.reply; import jakarta.persistence.Transient; import lombok.RequiredArgsConstructor; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import shop.mtcoding.blog._core.erros.exception.Exception404; import shop.mtcoding.blog.board.Board; import shop.mtcoding.blog.board.BoardJPARepository; import shop.mtcoding.blog.user.User; @RequiredArgsConstructor @Service public class ReplyService { private final BoardJPARepository boardJPARepository; private final ReplyJPARepository replyJPARepository; @Transactional public void 댓글쓰기(ReplyRequest.SaveDTO reqDTO, User sessionUser) { Board board = boardJPARepository.findById(reqDTO.getBoardId()) .orElseThrow(() -> new Exception404("없는 게시글에 댓글을 작성할 수 없어요")); Reply reply = reqDTO.toEntity(sessionUser, board); replyJPARepository.save(reply); } }

package shop.mtcoding.blog.reply; import jakarta.servlet.http.HttpSession; import lombok.RequiredArgsConstructor; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PostMapping; import shop.mtcoding.blog.user.User; @RequiredArgsConstructor @Controller public class ReplyController { private final ReplyService replyService; private final HttpSession session; @PostMapping("/reply/save") public String save(ReplyRequest.SaveDTO reqDTO){ User sessionUser = (User) session.getAttribute("sessionUser"); replyService.댓글쓰기(reqDTO, sessionUser); return "redirect:/board/"+reqDTO.getBoardId(); } }