feat(community): 게시글 ID로 댓글 조회 메서드 추가

Author: ayoung-dev

src/main/java/com/somemore/community/repository/comment/CommunityCommentRepository.java

@@ -1,12 +1,15 @@
 package com.somemore.community.repository.comment;
 
 import com.somemore.community.domain.CommunityComment;
+import com.somemore.community.repository.mapper.CommunityCommentView;
 
+import java.util.List;
 import java.util.Optional;
 
 public interface CommunityCommentRepository {
     CommunityComment save(CommunityComment communityComment);
     Optional<CommunityComment> findById(Long id);
+    List<CommunityCommentView> findCommentsByBoardId(Long boardId);
     boolean existsById(Long id);
     default boolean doesNotExistById(Long id) {
         return !existsById(id);

src/main/java/com/somemore/community/repository/comment/CommunityCommentRepositoryImpl.java

@@ -1,11 +1,15 @@
 package com.somemore.community.repository.comment;
 
+import com.querydsl.core.types.Projections;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import com.somemore.community.domain.CommunityComment;
 import com.somemore.community.domain.QCommunityComment;
+import com.somemore.community.repository.mapper.CommunityCommentView;
+import com.somemore.volunteer.domain.QVolunteer;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
 import java.util.Optional;
 
 @RequiredArgsConstructor
@@ -31,6 +35,21 @@ public Optional<CommunityComment> findById(Long id) {
                 .fetchOne());
     }
 
+    public List<CommunityCommentView> findCommentsByBoardId(Long boardId) {
+        QCommunityComment communityComment = QCommunityComment.communityComment;
+        QVolunteer volunteer = QVolunteer.volunteer;
+
+        return queryFactory
+                .select(Projections.constructor(CommunityCommentView.class,
+                        communityComment,
+                        volunteer.nickname))
+                .from(communityComment)
+                .join(volunteer).on(communityComment.writerId.eq(volunteer.id))
+                .where(communityComment.communityBoardId.eq(boardId))
+                .orderBy(communityComment.parentCommentId.asc().nullsFirst(), communityComment.createdAt.asc())
+                .fetch();
+    }
+
     @Override
     public boolean existsById(Long id) {
         QCommunityComment communityComment = QCommunityComment.communityComment;