Fix: 삭제로직 재수정 (#185)

* fix: jpa type 에러, 엔티티 lazy 조회 이슈 해결

* fix: 원 댓글조회 쿼리 변경, 투표 총댓글 수 감소 로직변경

src/main/java/com/salmalteam/salmal/comment/application/CommentService.java

@@ -30,6 +30,8 @@
 import com.salmalteam.salmal.vote.dto.request.VoteCommentUpdateRequest;
 import com.salmalteam.salmal.vote.entity.Vote;
 import com.salmalteam.salmal.vote.entity.VoteRepository;
+import com.salmalteam.salmal.vote.exception.VoteException;
+import com.salmalteam.salmal.vote.exception.VoteExceptionType;
 
 import lombok.RequiredArgsConstructor;
 
@@ -50,20 +52,30 @@ public void save(final String content, final Vote vote, final Member member) {
 
 	@Transactional
 	public void deleteComment(final Long memberId, final Long commentId) {
-		final Comment comment = getCommentById(commentId);
+
+		final Comment comment = commentRepository.findByIdFetchJoinCommenter(commentId)
+			.orElseThrow(() -> new CommentException(CommentExceptionType.NOT_FOUND));
+
 		validateDeleteAuthority(comment.getCommenter().getId(), memberId);
+
 		if (comment.isComment()) {
 			long deleteComment = commentRepository.countByParentComment(comment) + 1;
-			Vote vote = comment.getVote();
+			Vote vote = voteRepository.findById(comment.getVote().getId())
+				.orElseThrow(() -> new VoteException(VoteExceptionType.NOT_FOUND));
+
 			vote.decreaseCommentCount(Math.toIntExact(deleteComment));
 			commentRepository.deleteAllRepliesByParentCommentId(commentId);
 			commentRepository.delete(comment);
 			return;
 		}
 
-		Comment parentComment = comment.getParentComment();
-		commentRepository.decreaseReplyCount(commentId);
-		voteRepository.decreaseCommentCount(parentComment.getVote().getId());
+		Comment parentComment = commentRepository.findByIdFetchJoinVote(comment.getParentComment().getId())
+			.orElseThrow(() -> new CommentException(CommentExceptionType.NOT_FOUND));
+
+		parentComment.decreaseReplyCount(1);
+		Vote vote = parentComment.getVote();
+		vote.decreaseCommentCount(1);
+
 		commentRepository.delete(comment);
 	}
 

src/main/java/com/salmalteam/salmal/comment/entity/CommentRepository.java

@@ -35,4 +35,7 @@ public interface CommentRepository extends JpaRepository<Comment, Long>, Comment
 	void increaseReplyCount(Long id);
 
 	Long countByParentComment(Comment comment);
+
+	@Query("select c from Comment c join fetch c.vote where c.id=:id")
+	Optional<Comment> findByIdFetchJoinVote(@Param("id") Long id);
 }