[14주차] 홍정우 학습 PR 제출입니다.

README.md

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+<img width="769" alt="스크린샷 2024-01-03 오후 4 01 30" src="https://github.com/Erichong7/jpa-practice/assets/97429550/5cfd774e-2d59-419e-92e1-647043f22e1c">
+
+api 문서 : https://documenter.getpostman.com/view/29836884/2s9YsFEEBq

src/main/java/com/example/jpa/board/controller/BoardController.java

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+package com.example.jpa.board.controller;
+
+import com.example.jpa.board.dto.request.BoardCreateRequest;
+import com.example.jpa.board.dto.request.BoardUpdateRequest;
+import com.example.jpa.board.dto.response.BoardResponse;
+import com.example.jpa.board.service.BoardService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("api/board")
+@RequiredArgsConstructor
+public class BoardController {
+
+    private final BoardService boardService;
+
+    @PostMapping
+    public ResponseEntity<Void> create(@RequestBody BoardCreateRequest boardCreateRequest) {
+
+        boardService.create(boardCreateRequest);
+
+        return ResponseEntity.ok().build();
+    }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<BoardResponse> findOne(@PathVariable("id") Long id) {
+
+        BoardResponse boardResponse = boardService.findOne(id);
+
+        return ResponseEntity.ok(boardResponse);
+    }
+
+    @PatchMapping("/{id}")
+    public ResponseEntity<Void> update(@PathVariable("id") Long id, @RequestBody BoardUpdateRequest boardUpdateRequest) {
+
+        boardService.update(id, boardUpdateRequest);
+
+        return ResponseEntity.ok().build();
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> delete(@PathVariable("id") Long id) {
+
+        boardService.delete(id);
+
+        return ResponseEntity.ok().build();
+    }
+}

src/main/java/com/example/jpa/board/domain/Board.java

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+package com.example.jpa.board.domain;
+
+import com.example.jpa.comment.domain.Comment;
+import com.example.jpa.member.domain.Member;
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Board {
+    @Id
+    @GeneratedValue
+    @Column(name = "board_id")
+    private Long id;
+
+    private String title;
+
+    private String body;
+
+    @OneToMany(mappedBy = "board", cascade = CascadeType.REMOVE)
+    private List<Comment> comments = new ArrayList<>();
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "member_id")
+    private Member member;
+
+    @Builder
+    public Board(Member member, String title, String body) {
+        this.member = member;
+        this.title = title;
+        this.body = body;
+    }
+
+    public void update(String title, String body) {
+        this.title = title;
+        this.body = body;
+    }
+}

src/main/java/com/example/jpa/board/dto/request/BoardCreateRequest.java

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+package com.example.jpa.board.dto.request;
+
+import com.example.jpa.board.domain.Board;
+import com.example.jpa.member.domain.Member;
+import lombok.Getter;
+
+@Getter
+public class BoardCreateRequest {
+    private Long member;
+    private String title;
+    private String body;
+
+    public Board toEntity(Member member) {
+        return Board.builder()
+                .member(member)
+                .title(this.title)
+                .body(this.body)
+                .build();
+    }
+}

src/main/java/com/example/jpa/board/dto/request/BoardUpdateRequest.java

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+package com.example.jpa.board.dto.request;
+
+import lombok.Getter;
+
+@Getter
+public class BoardUpdateRequest {
+    private String title;
+    private String body;
+}

src/main/java/com/example/jpa/board/dto/response/BoardResponse.java

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+package com.example.jpa.board.dto.response;
+
+import com.example.jpa.board.domain.Board;
+import lombok.Getter;
+
+import java.util.List;
+
+@Getter
+public class BoardResponse {
+    private Long id;
+    private String title;
+    private String name;
+    private String body;
+    private List<String> comments;
+
+    public BoardResponse(Long id, String title, String name, String body, List<String> comments) {
+        this.id = id;
+        this.title = title;
+        this.name = name;
+        this.body = body;
+        this.comments = comments;
+    }
+
+    public static BoardResponse from(Board board, String name, List<String> comments) {
+        return new BoardResponse(board.getId(), board.getTitle(), name, board.getBody(), comments);
+    }
+}

src/main/java/com/example/jpa/board/repository/BoardRepository.java

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+package com.example.jpa.board.repository;
+
+import com.example.jpa.board.domain.Board;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface BoardRepository extends JpaRepository<Board, Long> {
+}

src/main/java/com/example/jpa/board/service/BoardService.java

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+package com.example.jpa.board.service;
+
+import com.example.jpa.board.domain.Board;
+import com.example.jpa.board.dto.request.BoardCreateRequest;
+import com.example.jpa.board.dto.request.BoardUpdateRequest;
+import com.example.jpa.board.dto.response.BoardResponse;
+import com.example.jpa.board.repository.BoardRepository;
+import com.example.jpa.comment.domain.Comment;
+import com.example.jpa.comment.dto.request.CommentCreateRequest;
+import com.example.jpa.comment.repository.CommentRepository;
+import com.example.jpa.member.domain.Member;
+import com.example.jpa.member.repository.MemberRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.NoSuchElementException;
+import java.util.stream.Collectors;
+
+@Service
+@RequiredArgsConstructor
+public class BoardService {
+
+    private final BoardRepository boardRepository;
+    private final MemberRepository memberRepository;
+    private final CommentRepository commentRepository;
+
+    @Transactional
+    public void create(BoardCreateRequest boardCreateRequest) {
+        Member member = memberRepository.findById(boardCreateRequest.getMember()).get();
+        boardRepository.save(boardCreateRequest.toEntity(member));
+    }
+
+    @Transactional(readOnly = true)
+    public BoardResponse findOne(Long id) {
+        Board board = boardRepository.findById(id)
+                .orElseThrow(() -> new NoSuchElementException("게시글이 존재하지 않습니다."));
+        List<String> comments = commentRepository.findByBoardId(id)
+                .stream()
+                .map(Comment::getBody)
+                .collect(Collectors.toList());
+
+        return BoardResponse.from(board, board.getMember().getName(), comments);
+    }
+
+    @Transactional
+    public void update(Long id, BoardUpdateRequest boardUpdateRequest) {
+        Board board = boardRepository.findById(id)
+                .orElseThrow(() -> new NoSuchElementException("게시글이 존재하지 않습니다."));
+        board.update(boardUpdateRequest.getTitle(), boardUpdateRequest.getBody());
+    }
+
+    @Transactional
+    public void delete(Long id) {
+        boardRepository.deleteById(id);
+    }
+}

src/main/java/com/example/jpa/comment/controller/CommentController.java

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+package com.example.jpa.comment.controller;
+
+import com.example.jpa.comment.dto.request.CommentCreateRequest;
+import com.example.jpa.comment.dto.request.CommentUpdateRequest;
+import com.example.jpa.comment.dto.response.CommentResponse;
+import com.example.jpa.comment.service.CommentService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/api/comment")
+public class CommentController {
+
+    private final CommentService commentService;
+
+    @PostMapping("/create")
+    public ResponseEntity<Void> create(@RequestBody CommentCreateRequest commentCreateRequest) {
+        Long saveResult = commentService.create(commentCreateRequest);
+        if (saveResult != null) {
+            return new ResponseEntity<>(HttpStatus.OK);
+        } else {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+    }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<CommentResponse> findOne(@PathVariable("id") Long id) {
+
+        CommentResponse commentResponse = commentService.findOne(id);
+
+        return ResponseEntity.ok(commentResponse);
+    }
+
+    @PatchMapping("/{id}")
+    public ResponseEntity<Void> update(@PathVariable("id") Long id, @RequestBody CommentUpdateRequest commentUpdateRequest) {
+
+        commentService.update(id, commentUpdateRequest);
+
+        return ResponseEntity.ok().build();
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> delete(@PathVariable("id") Long id) {
+
+        commentService.delete(id);
+
+        return ResponseEntity.ok().build();
+    }
+
+    @GetMapping
+    public ResponseEntity<List> findAll() {
+
+        List<CommentResponse> commentResponses = commentService.findAll();
+
+        return ResponseEntity.ok(commentResponses);
+    }
+}

src/main/java/com/example/jpa/comment/domain/Comment.java

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+package com.example.jpa.comment.domain;
+
+import com.example.jpa.board.domain.Board;
+import com.example.jpa.member.domain.Member;
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Comment {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "member_id")
+    private Member member;
+
+    @Column
+    private String body;
+
+    /* Board:Comment = 1:N */
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "board_id")
+    private Board board;
+
+    @Builder
+    public Comment(Member member, String body, Board board) {
+        this.member = member;
+        this.body = body;
+        this.board = board;
+    }
+
+    public void update(String body) {
+        this.body = body;
+    }
+}

src/main/java/com/example/jpa/comment/dto/request/CommentCreateRequest.java

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+package com.example.jpa.comment.dto.request;
+
+import com.example.jpa.board.domain.Board;
+import com.example.jpa.comment.domain.Comment;
+import com.example.jpa.member.domain.Member;
+import lombok.Getter;
+
+@Getter
+public class CommentCreateRequest {
+    private Long member;
+    private Long board;
+    private String body;
+
+    public Comment toEntity(Member member, Board board) {
+        return Comment.builder()
+                .member(member)
+                .board(board)
+                .body(this.body)
+                .build();
+    }
+}

src/main/java/com/example/jpa/comment/dto/request/CommentUpdateRequest.java

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+package com.example.jpa.comment.dto.request;
+
+import lombok.Getter;
+
+@Getter
+public class CommentUpdateRequest {
+    private String body;
+}

src/main/java/com/example/jpa/comment/dto/response/CommentResponse.java

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+package com.example.jpa.comment.dto.response;
+
+import com.example.jpa.comment.domain.Comment;
+import lombok.Getter;
+
+@Getter
+public class CommentResponse {
+
+    private Long id;
+    private String body;
+
+    public CommentResponse(Long id, String body) {
+        this.id = id;
+        this.body = body;
+    }
+
+    public static CommentResponse from(Comment comment) {
+        return new CommentResponse(comment.getId(), comment.getBody());
+    }
+}

src/main/java/com/example/jpa/comment/repository/CommentRepository.java

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+package com.example.jpa.comment.repository;
+
+import com.example.jpa.comment.domain.Comment;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Arrays;
+import java.util.List;
+
+public interface CommentRepository extends JpaRepository<Comment, Long> {
+    List<Comment> findByBoardId(Long boardId);
+}