refactor/#251 User, Post, Comment, FileEntity간 관계 매핑을 ID 참조로 변경 (#259)

* refactor: Post에서 File을 fileId를 참조하도록 변경

* refactor: Post-User 엔티티 매핑 제거

* refactor: Comment-User&Post 엔티티 매핑 제거

* refactor: Post-Comment 엔티티 매핑 제거

* refactor: 불필요한 import 제거

* test: 테스트용 작성자 ID 상수화

* refactor: updateFile 메서드 명 변경

* refactor: @column name속성 제거

* test: 테스트용 작성자ID, 게시글 ID 상수화

* test: 테스트용 User 정보 추가

* refactor: 만약 시간이 동일할 경우 id를 기준으로 직전/직후 포스트를 조회하도록 쿼리 수정

* refactor: 만약 시간이 동일할 경우 id를 기준으로 조회된 포스트를 정렬하도록 쿼리 수정

* test: FakePostRepository의 게시글 조회 시 고정 여부를 정렬 기준에 포함

* fix: PostQueryService 의존성 추가에 맞춰 FileRepository/FileQueryService 공급자 등록

* fix: Post의 authorId 길이 속성을 10으로 설정

Author: JangYeongHu

aics-admin/src/testFixtures/java/post/application/PostAdminFacadeTest.java

@@ -44,7 +44,7 @@ public void init() {
 		FileQueryService fileQueryService = new FileQueryService(fakeFileRepository);
 		this.postAdminFacade = new PostAdminFacade(
 			new PostCommandService(userQueryService, fakePostRepository, fileQueryService),
-			new PostQueryService(fakePostRepository),
+			new PostQueryService(fakePostRepository, fakeFileRepository, fakeUserRepository),
 			new PostSchedulingService(fakePostRepository)
 		);
 
@@ -65,7 +65,7 @@ public void init() {
 
 		fakePostRepository.save(
 			Post.create(
-				"post title", "post content", NOTIFICATION, author, null, false
+				"post title", "post content", NOTIFICATION, author.getId(), null, false
 			)
 		);
 	}

aics-api/src/main/java/kgu/developers/api/comment/application/CommentFacade.java

@@ -1,7 +1,10 @@
 package kgu.developers.api.comment.application;
 
 import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
 
+import kgu.developers.domain.user.application.query.UserQueryService;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -22,6 +25,7 @@ public class CommentFacade {
 	private final CommentCommandService commentCommandService;
 	private final CommentQueryService commentQueryService;
 	private final CommentSchedulingService commentSchedulingService;
+	private final UserQueryService userQueryService;
 
 	public CommentPersistResponse createComment(CommentRequest request) {
 		Long id = commentCommandService.createComment(request.content(), request.postId());
@@ -30,7 +34,11 @@ public CommentPersistResponse createComment(CommentRequest request) {
 
 	public CommentListResponse getComments(Long postId) {
 		List<Comment> comments = commentQueryService.getComments(postId);
-		return CommentListResponse.from(comments);
+
+		List<String> authorIds = comments.stream().map(Comment::getAuthorId).collect(Collectors.toList());
+
+		Map<String, String> nameMap = userQueryService.getUserNameMapByIds(authorIds);
+		return CommentListResponse.from(comments,nameMap);
 	}
 
 	public void updateComment(Long commentId, CommentUpdateRequest request) {

aics-api/src/main/java/kgu/developers/api/comment/presentation/response/CommentListResponse.java

@@ -7,6 +7,7 @@
 import lombok.Builder;
 
 import java.util.List;
+import java.util.Map;
 
 @Builder
 public record CommentListResponse(
@@ -19,10 +20,10 @@ public record CommentListResponse(
 		requiredMode = REQUIRED)
 	List<CommentResponse> contents
 ) {
-	public static CommentListResponse from(List<Comment> comments) {
+	public static CommentListResponse from(List<Comment> comments, Map<String,String> nameMap) {
 		return CommentListResponse.builder()
 			.contents(comments.stream()
-				.map(CommentResponse::from)
+				.map(comment -> CommentResponse.from(comment,nameMap.get(comment.getAuthorId())))
 				.toList())
 			.build();
 	}

aics-api/src/main/java/kgu/developers/api/comment/presentation/response/CommentResponse.java

@@ -24,11 +24,11 @@ public record CommentResponse(
 	@Schema(description = "내용", example = "예시 코멘트입니다, 좋은 소식이네요!", requiredMode = REQUIRED)
 	String content
 ) {
-	public static CommentResponse from(Comment comment) {
+	public static CommentResponse from(Comment comment, String authorName) {
 		DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
 		return CommentResponse.builder()
 			.commentId(comment.getId())
-			.author(comment.getAuthor().getName())
+			.author(authorName)
 			.createdAt(comment.getCreatedAt().format(formatter))
 			.content(comment.getContent())
 			.build();

aics-api/src/main/java/kgu/developers/api/post/application/PostFacade.java

@@ -1,7 +1,11 @@
 package kgu.developers.api.post.application;
 
 import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
 
+import kgu.developers.domain.user.application.query.UserQueryService;
+import kgu.developers.domain.user.domain.User;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -20,12 +24,26 @@
 public class PostFacade {
 	private final PostCommandService postCommandService;
 	private final PostQueryService postQueryService;
+	private final UserQueryService userQueryService;
 
 	public PostSummaryPageResponse getPostsByKeywordAndCategory(PageRequest request, List<String> keywords,
 		Category category) {
 		PaginatedListResponse<Post> paginatedListResponse = postQueryService.getPostsByKeywordAndCategory(request,
 			keywords, category);
-		return PostSummaryPageResponse.of(paginatedListResponse.contents(), paginatedListResponse.pageable());
+
+		List<String> authorIds = paginatedListResponse.contents().stream()
+			.map(Post::getAuthorId)
+			.distinct()
+			.toList();
+
+		Map<String, String> authorNameMap = userQueryService.getAllUsersByIds(authorIds).stream()
+			.collect(Collectors.toMap(
+				User::getId,
+				User::getName
+			));
+
+		return PostSummaryPageResponse.of(paginatedListResponse.contents(),
+			paginatedListResponse.pageable(), authorNameMap);
 	}
 
 	@Transactional

aics-api/src/main/java/kgu/developers/api/post/presentation/response/PostSummaryPageResponse.java

@@ -8,6 +8,7 @@
 import lombok.Builder;
 
 import java.util.List;
+import java.util.Map;
 
 @Builder
 public record PostSummaryPageResponse<T>(
@@ -28,10 +29,10 @@ public record PostSummaryPageResponse<T>(
 	@Schema(description = "페이징 정보", requiredMode = REQUIRED)
 	PageableResponse<T> pageable
 ) {
-	public static <T> PostSummaryPageResponse<T> of(List<Post> posts, PageableResponse<T> pageable) {
+	public static <T> PostSummaryPageResponse<T> of(List<Post> posts, PageableResponse<T> pageable, Map<String, String>authorNameMap) {
 		return PostSummaryPageResponse.<T>builder()
 			.contents(posts.stream()
-				.map(PostSummaryResponse::from)
+				.map(post -> PostSummaryResponse.from(post, authorNameMap.get(post.getAuthorId())))
 				.toList())
 			.pageable(pageable)
 			.build();

aics-api/src/main/java/kgu/developers/api/post/presentation/response/PostSummaryResponse.java

@@ -39,7 +39,7 @@ public record PostSummaryResponse(
 	@DateTimeFormat(pattern = "yyyy-MM-dd")
 	String createdAt
 ) {
-	public static PostSummaryResponse from(Post post) {
+	public static PostSummaryResponse from(Post post, String authorName) {
 		DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
 
 		String content = post.getContent();
@@ -49,7 +49,7 @@ public static PostSummaryResponse from(Post post) {
 			.postId(post.getId())
 			.category(post.getCategory().getDescription())
 			.title(post.getTitle())
-			.author(post.getAuthor().getName())
+			.author(authorName)
 			.description(description)
 			.views(post.getViews())
 			.hasAttachment(false) // TODO : 첨부파일 여부 확인

aics-api/src/testFixtures/java/comment/application/CommentFacadeTest.java

@@ -6,6 +6,7 @@
 
 import java.util.List;
 
+import mock.repository.FakeFileRepository;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
@@ -39,17 +40,21 @@ public class CommentFacadeTest {
 	public void init() {
 		FakeCommentRepository fakeCommentRepository = new FakeCommentRepository();
 		FakeUserRepository fakeUserRepository = new FakeUserRepository();
+		FakeFileRepository fakeFileRepository = new FakeFileRepository();
 		FakePostRepository fakePostRepository = new FakePostRepository();
 
 		UserQueryService userQueryService = new UserQueryService(fakeUserRepository);
+		PostQueryService postQueryService = new PostQueryService(fakePostRepository, fakeFileRepository, fakeUserRepository);
+
 		commentFacade = new CommentFacade(
 			new CommentCommandService(
-				new PostQueryService(fakePostRepository),
+				postQueryService,
 				userQueryService,
 				fakeCommentRepository
 			),
 			new CommentQueryService(fakeCommentRepository),
-			new CommentSchedulingService(fakeCommentRepository)
+			new CommentSchedulingService(fakeCommentRepository),
+			userQueryService
 		);
 
 		User author = fakeUserRepository.save(User.builder()
@@ -62,15 +67,15 @@ public void init() {
 			.build());
 
 		Post post = fakePostRepository.save(Post.create(
-			"테스트용 제목1", "테스트용 내용1", NEWS, author, null, false
+			"테스트용 제목1", "테스트용 내용1", NEWS, author.getId(), null, false
 		));
 
 		fakeCommentRepository.save(Comment.create(
-			"test1", author, post
+			"test1", author.getId(), post.getId()
 		));
 
 		Comment delete = fakeCommentRepository.save(Comment.create(
-			"test2", author, post
+			"test2", author.getId(), post.getId()
 		));
 		delete.delete();
 

aics-api/src/testFixtures/java/post/application/PostFacadeTest.java

@@ -48,7 +48,8 @@ public void init() {
 
 		postFacade = new PostFacade(
 			new PostCommandService(userQueryService, fakePostRepository, fileQueryService),
-			new PostQueryService(fakePostRepository)
+			new PostQueryService(fakePostRepository, fakeFileRepository, fakeUserRepository),
+			new UserQueryService(fakeUserRepository)
 		);
 
 		User author = fakeUserRepository.save(User.builder()
@@ -67,16 +68,16 @@ public void init() {
 		);
 
 		fakePostRepository.save(Post.create(
-			"first title", "first content", NEWS, author, null, false
+			"first title", "first content", NEWS, author.getId(), null, false
 		));
 
 		Post delete = fakePostRepository.save(Post.create(
-			"second title", "second content", NEWS, author, null, false
+			"second title", "second content", NEWS, author.getId(), null, false
 		));
 		delete.delete();
 
 		fakePostRepository.save(Post.create(
-			"third title", "third content", NEWS, author, null, false
+			"third title", "third content", NEWS, author.getId(), null, false
 		));
 	}
 

aics-domain/src/main/java/kgu/developers/domain/comment/application/command/CommentCommandService.java

@@ -20,7 +20,7 @@ public class CommentCommandService {
 	public Long createComment(String content, Long postId) {
 		Post post = postQueryService.getById(postId);
 		User user = userQueryService.me();
-		Comment comment = Comment.create(content, user, post);
+		Comment comment = Comment.create(content, user.getId(), post.getId());
 		return commentRepository.save(comment).getId();
 	}