[feat] #23 댓글 개수 조회 기능 추가 및 API 버그 수정

src/main/java/com/blog/domain/board/application/dto/PostReadAllResponse.java

@@ -6,13 +6,14 @@
 
 @Builder
 public record PostReadAllResponse(
-	List<PostReadResponse> post,
-	long pageMax
+		List<PostSummaryResponse> posts,
+		long pageMax
 ) {
-	public static PostReadAllResponse toResponse(List<PostReadResponse> postDtos, int pageSize) {
+	public static PostReadAllResponse toResponse(List<PostSummaryResponse> postDtos, int pageSize) {
 		return PostReadAllResponse.builder()
-			.post(postDtos)
-			.pageMax(pageSize)
-			.build();
+				.posts(postDtos)
+				.pageMax(pageSize)
+				.build();
 	}
 }
+

src/main/java/com/blog/domain/board/application/dto/PostReadResponse.java

@@ -14,41 +14,46 @@
 
 @Builder
 public record PostReadResponse(
-        @Schema(description = "게시글 id", example = "3fa85f64-5717-4562-b3fc-2c963f66afa6")
-        UUID postId,
-        @Schema(description = "게시글 제목", example = "게시글 제목")
-        String title,
-        @ArraySchema(arraySchema = @Schema(implementation = ContentDto.class))
-        List<ContentDto> contents,
-        @Schema(description = "게시글 소유 여부", example = "true")
-        Boolean isOwner,
-        @ArraySchema(arraySchema = @Schema(implementation = CommentGetDto.class))
-        List<CommentGetDto> comments,
-        @Schema(description = "작성자 닉네임", example = "멋쟁이프론트")
-        String nickName,
-        @Schema(description = "작성자 프로필 사진 url", example = "url")
-        String profileUrl,
-        @Schema(description = "게시글 작성일자", implementation = LocalDateTime.class)
-        LocalDateTime createdAt
+    @Schema(description = "게시글 id", example = "3fa85f64-5717-4562-b3fc-2c963f66afa6")
+    UUID postId,
+    @Schema(description = "게시글 제목", example = "게시글 제목")
+    String title,
+    @ArraySchema(arraySchema = @Schema(implementation = ContentDto.class))
+    List<ContentDto> contents,
+    @Schema(description = "게시글 소유 여부", example = "true")
+    Boolean isOwner,
+    @ArraySchema(arraySchema = @Schema(implementation = CommentGetDto.class))
+    List<CommentGetDto> comments,
+    @Schema(description = "작성자 닉네임", example = "멋쟁이프론트")
+    String nickName,
+    @Schema(description = "작성자 프로필 사진 url", example = "url")
+    String profileUrl,
+    @Schema(description = "작성자 한 줄 소개", example = "안녕하세요. 반갑습니다.")
+    String introduction,
+    @Schema(description = "게시글 작성일자", implementation = LocalDateTime.class)
+    LocalDateTime createdAt
 ) {
-    public static PostReadResponse toResponse(Post post, User user, List<Content> contents, List<Comment> comments) {
-        List<CommentGetDto> dtos = comments.stream()
-                .map(comment -> CommentGetDto.toResponse(comment, user))
-                .toList();
+  public static PostReadResponse toResponse(Post post, User user, List<Content> contents, List<Comment> comments) {
+    List<CommentGetDto> dtos = comments.stream()
+        .map(comment -> CommentGetDto.toResponse(comment, user))
+        .toList();
 
-        List<ContentDto> contentDtos = contents.stream()
-                .map(ContentDto::fromContent)
-                .toList();
+    List<ContentDto> contentDtos = contents.stream()
+        .map(ContentDto::fromContent)
+        .toList();
 
-        return PostReadResponse.builder()
-                .postId(post.getId())
-                .title(post.getTitle())
-                .contents(contentDtos)
-                .isOwner(user != null && post.getUser().equals(user))
-                .nickName(post.getUser().getNickname())
-                .profileUrl(post.getUser().getProfilePicture())
-                .createdAt(post.getCreatedAt())
-                .comments(dtos)
-                .build();
-    }
+    User postAuthor = post.getUser();
+    return PostReadResponse.builder()
+        .postId(post.getId())
+        .title(post.getTitle())
+        .contents(contentDtos)
+        .isOwner(user != null && postAuthor.getId().equals(user.getId()))
+        .nickName(postAuthor.getNickname())
+        .profileUrl(postAuthor.getProfilePicture())
+        .introduction(postAuthor.getIntroduction())
+        .createdAt(post.getCreatedAt())
+        .comments(dtos)
+        .build();
+  }
 }
+

src/main/java/com/blog/domain/board/application/dto/PostSummaryResponse.java

@@ -0,0 +1,33 @@
+package com.blog.domain.board.application.dto;
+
+import com.blog.domain.board.domain.entity.Post;
+import java.time.LocalDateTime;
+import java.util.UUID;
+import lombok.Builder;
+
+@Builder
+public record PostSummaryResponse(
+    UUID postId,
+    String title,
+    String nickName,
+    String profileUrl,
+    LocalDateTime createdAt,
+    long commentCount
+) {
+    public static PostSummaryResponse from(Post post) {
+        // N+1 문제를 방지하기 위해 post.getComments().size() 대신
+        // commentRepository.countByPost(post) 등을 사용하는 것을 고려해볼 수 있습니다.
+        // 하지만 현재 구조에서는 size()를 사용하겠습니다.
+        long count = post.getComments() == null ? 0 : post.getComments().size();
+
+        return PostSummaryResponse.builder()
+            .postId(post.getId())
+            .title(post.getTitle())
+            .nickName(post.getUser().getNickname())
+            .profileUrl(post.getUser().getProfilePicture())
+            .createdAt(post.getCreatedAt())
+            .commentCount(count)
+            .build();
+    }
+}
+

src/main/java/com/blog/domain/board/application/usecase/PostManageUsecase.java

@@ -1,15 +1,9 @@
 package com.blog.domain.board.application.usecase;
 
-import java.util.List;
-import java.util.UUID;
-
-import org.springframework.data.domain.Page;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-
 import com.blog.domain.board.application.dto.PostCreateRequest;
 import com.blog.domain.board.application.dto.PostReadAllResponse;
 import com.blog.domain.board.application.dto.PostReadResponse;
+import com.blog.domain.board.application.dto.PostSummaryResponse;
 import com.blog.domain.board.application.dto.PostUpdateRequest;
 import com.blog.domain.board.domain.entity.Content;
 import com.blog.domain.board.domain.entity.Post;
@@ -26,8 +20,12 @@
 import com.blog.domain.comment.domain.service.CommentGetService;
 import com.blog.domain.user.domain.entity.User;
 import com.blog.domain.user.domain.service.UserGetService;
-
+import java.util.List;
+import java.util.UUID;
 import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 @Service
 @RequiredArgsConstructor
@@ -75,16 +73,12 @@ public PostReadResponse readPostNoToken(UUID postId) {
 
 	@Transactional(readOnly = true)
 	public PostReadAllResponse readAllPost(Long userId, int size, int page) {
-		User user = userGetService.find(userId);
 		Page<Post> postPage = postGetService.findAll(size, page);
 		List<Post> posts = postPage.getContent();
 
-		List<PostReadResponse> dtos = posts.stream()
-			.map(post -> {
-				List<Content> contents = contentGetService.findAll(post);
-				List<Comment> comments = commentGetService.findALlByPost(post);
-				return PostReadResponse.toResponse(post, user, contents, comments);
-			}).toList();
+		List<PostSummaryResponse> dtos = posts.stream()
+				.map(PostSummaryResponse::from)
+				.toList();
 
 		return PostReadAllResponse.toResponse(dtos, postPage.getTotalPages());
 	}
@@ -94,12 +88,9 @@ public PostReadAllResponse readAllPostNoToken(int size, int page) {
 		Page<Post> postPage = postGetService.findAll(size, page);
 		List<Post> posts = postPage.getContent();
 
-		List<PostReadResponse> dtos = posts.stream()
-			.map(post -> {
-				List<Content> contents = contentGetService.findAll(post);
-				List<Comment> comments = commentGetService.findALlByPost(post);
-				return PostReadResponse.toResponse(post, null, contents, comments);
-			}).toList();
+		List<PostSummaryResponse> dtos = posts.stream()
+				.map(PostSummaryResponse::from)
+				.toList();
 
 		return PostReadAllResponse.toResponse(dtos, postPage.getTotalPages());
 	}
@@ -129,3 +120,4 @@ public void deletePost(Long userId, UUID postId) {
 		postDeleteService.delete(post);
 	}
 }
+

src/main/java/com/blog/domain/board/domain/entity/Post.java

@@ -1,6 +1,8 @@
 package com.blog.domain.board.domain.entity;
 
+import com.blog.domain.comment.domain.entity.Comment;
 import com.blog.domain.user.domain.entity.User;
+import jakarta.persistence.CascadeType;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;
@@ -9,9 +11,12 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
 import jakarta.persistence.Table;
 import jakarta.validation.constraints.NotBlank;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.UUID;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
@@ -43,15 +48,24 @@ public class Post {
     @CreationTimestamp
     private LocalDateTime createdAt;
 
+    @Builder.Default
+    @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<Comment> comments = new ArrayList<>();
+
+    @Builder.Default
+    @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<Content> contents = new ArrayList<>();
+
 
     public static Post CreatePost(String title, User user) {
         return Post.builder().
-                title(title).
-                user(user).
-                build();
+            title(title).
+            user(user).
+            build();
     }
 
     public void update(String title) {
         this.title = title;
     }
 }
+

src/main/java/com/blog/domain/comment/application/dto/CommentGetDto.java

@@ -3,26 +3,35 @@
 import com.blog.domain.comment.domain.entity.Comment;
 import com.blog.domain.user.domain.entity.User;
 import io.swagger.v3.oas.annotations.media.Schema;
+import java.time.LocalDateTime;
 import lombok.Builder;
 
 @Schema(description = "댓글 DTO")
 @Builder
 public record CommentGetDto(
-        @Schema(description = "댓글 Id", example = "1")
-        long commentId,
-        @Schema(description = "댓글 내용", example = "댓글 내용")
-        String content,
-        @Schema(description = "작성자 닉네임", example = "작성자 닉네임")
-        String nickName,
-        @Schema(description = "댓글 소유 여부", example = "true")
-        boolean isOwner
+    @Schema(description = "댓글 Id", example = "1")
+    long commentId,
+    @Schema(description = "댓글 내용", example = "댓글 내용")
+    String content,
+    @Schema(description = "작성자 닉네임", example = "작성자 닉네임")
+    String nickName,
+    @Schema(description = "작성자 프로필 이미지 URL", example = "https://example.com/profile.jpg")
+    String profileUrl,
+    @Schema(description = "댓글 작성 시간")
+    LocalDateTime createdAt,
+    @Schema(description = "댓글 소유 여부", example = "true")
+    boolean isOwner
 ) {
-    public static CommentGetDto toResponse(Comment comment, User user) {
-        return CommentGetDto.builder()
-                .commentId(comment.getId())
-                .content(comment.getContent())
-                .nickName(user == null ? null : user.getNickname())
-                .isOwner(comment.getUser().equals(user))
-                .build();
-    }
+  public static CommentGetDto toResponse(Comment comment, User loginUser) {
+    User commentAuthor = comment.getUser();
+    return CommentGetDto.builder()
+        .commentId(comment.getId())
+        .content(comment.getContent())
+        .nickName(commentAuthor.getNickname())
+        .profileUrl(commentAuthor.getProfilePicture())
+        .createdAt(comment.getCreatedAt())
+        .isOwner(loginUser != null && commentAuthor.getId().equals(loginUser.getId()))
+        .build();
+  }
 }
+

src/main/java/com/blog/domain/comment/domain/entity/Comment.java

@@ -12,10 +12,12 @@
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.Table;
 import jakarta.validation.constraints.NotBlank;
+import java.time.LocalDateTime;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
+import org.hibernate.annotations.CreationTimestamp;
 
 @Entity
 @Builder
@@ -41,12 +43,16 @@ public class Comment {
     @NotBlank
     private String content;
 
+    @CreationTimestamp
+    @Column(name = "created_at", updatable = false, nullable = false)
+    private LocalDateTime createdAt;
+
     public static Comment of(String content, Post post, User user) {
         return Comment.builder()
-                .content(content)
-                .post(post)
-                .user(user)
-                .build();
+            .content(content)
+            .post(post)
+            .user(user)
+            .build();
     }
 
     public void updateContent(String content) {

src/main/java/com/blog/domain/user/application/dto/response/UserGetResponse.java

@@ -6,15 +6,21 @@ public record UserGetResponse(
     Long id,
     String email,
     String nickname,
-    String profilePicture
+    String profilePicture,
+    String name,
+    String birthDate,
+    String introduction
 ) {
 
   public static UserGetResponse from(User user) {
     return new UserGetResponse(
         user.getId(),
         user.getEmail(),
         user.getNickname(),
-        user.getProfilePicture()
+        user.getProfilePicture(),
+        user.getName(),
+        user.getBirthDate().toString(),
+        user.getIntroduction()
     );
   }
 }

src/main/java/com/blog/domain/user/domain/service/UserService.java

@@ -9,6 +9,7 @@
 import com.blog.domain.user.exception.UserNotFoundException;
 import com.blog.global.common.auth.MemberContext;
 import com.blog.global.common.auth.TokenMemberInfo;
+import com.blog.global.common.exception.BadRequestException;
 import jakarta.transaction.Transactional;
 import java.util.Optional;
 import lombok.RequiredArgsConstructor;
@@ -96,6 +97,10 @@ public void updatePassword(String password) {
     TokenMemberInfo member = MemberContext.getMember();
     User user = this.findById(member.id());
 
+    if (user.getKakaoId() != null) {
+      throw new BadRequestException("소셜 로그인 유저는 비밀번호를 변경할 수 없습니다.");
+    }
+
     user.setPassword(this.hashPassword(password));
   }
 
@@ -127,3 +132,4 @@ public void updateUser(UserPatchRequest userPatchRequest) {
     this.save(user);
   }
 }
+