feat(community): 커뮤니티 댓글 존재 여부 메서드 및 테스트 추가

Author: ayoung-dev

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

@@ -7,5 +7,6 @@
 public interface CommunityCommentRepository {
     CommunityComment save(CommunityComment communityComment);
     Optional<CommunityComment> findById(Long id);
+    boolean existsById(Long id);
     void deleteAllInBatch();
 }

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

@@ -7,6 +7,7 @@
 import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
+import java.util.UUID;
 
 @RequiredArgsConstructor
 @Repository
@@ -31,6 +32,18 @@ public Optional<CommunityComment> findById(Long id) {
                 .fetchOne());
     }
 
+    @Override
+    public boolean existsById(Long id) {
+        QCommunityComment communityComment = QCommunityComment.communityComment;
+
+        return queryFactory
+                .selectOne()
+                .from(communityComment)
+                .where(communityComment.id.eq(id)
+                        .and(communityComment.deleted.eq(false)))
+                .fetchFirst() != null;
+    }
+
     @Override
     public void deleteAllInBatch() { communityCommentJpaRepository.deleteAllInBatch(); }
 }

src/main/java/com/somemore/community/service/comment/CreateCommunityCommentService.java

@@ -30,10 +30,8 @@ public Long createCommunityComment(CommunityCommentCreateRequestDto requestDto,
     }
 
     private void validateParentCommentExists(Long parentCommentId) {
-        if (parentCommentId != null) {
-            communityCommentRepository.findById(parentCommentId)
-                    .orElseThrow(() -> new BadRequestException(NOT_EXISTS_COMMUNITY_COMMENT.getMessage()));
+        if (parentCommentId != null && !communityCommentRepository.existsById(parentCommentId)) {
+            throw new BadRequestException(NOT_EXISTS_COMMUNITY_COMMENT.getMessage());
         }
     }
-
 }

src/test/java/com/somemore/community/repository/CommunityCommentRepositoryTest.java

@@ -86,4 +86,26 @@ void findCommunityCommentById() {
         assertThat(comment.get().getContent()).isEqualTo("커뮤니티 댓글 테스트 내용");
         assertThat(comment.get().getParentCommentId()).isNull();
     }
+
+    @DisplayName("댓글 id로 댓글이 존재하는지 확인할 수 있다.")
+    @Test
+    void existsById() {
+
+        //given
+        UUID writerId = UUID.randomUUID();
+
+        CommunityComment communityComment = CommunityComment.builder()
+                .writerId(writerId)
+                .content("커뮤니티 댓글 테스트 내용")
+                .parentCommentId(null)
+                .build();
+
+        CommunityComment savedComment = communityCommentRepository.save(communityComment);
+
+        //when
+        boolean isExist = communityCommentRepository.existsById(savedComment.getId());
+
+        //then
+        assertThat(isExist).isTrue();
+    }
 }