feat(blog): apply readonly trasaction on get methods

src/main/java/kr/tgwing/tech/blog/service/PostServiceImpl.java

@@ -52,6 +52,7 @@ public class PostServiceImpl implements PostService {
     private final LikeHistoryRepository likeHistoryRepository;
 
     @Override
+    @Transactional(readOnly = true)
     public PostDetail getPost(Long postId, String userStudentNumber) {
         User user = getUserEntity(userStudentNumber);
         Post post = getPostEntity(postId);
@@ -127,6 +128,7 @@ public void deletePost(Long postId, String writerStudentNumber) {
     }
 
     @Override
+    @Transactional(readOnly = true)
     public Page<PostOverview> getPostOverviews(PostQuery query, String userStudentNumber, Pageable pageable) {
         User user = getUserEntity(userStudentNumber);
         Specification<Post> spec = PostSpecifications.hasTitleLike(query.getKeyword())
@@ -149,6 +151,7 @@ public Page<PostOverview> getPostOverviews(PostQuery query, String userStudentNu
     }
 
     @Override
+    @Transactional(readOnly = true)
     public PostOverview getPostOverview(Long postId, String userStudentNumber) {
         Post post = getPostEntity(postId);
         User user = getUserEntity(userStudentNumber);
@@ -203,6 +206,7 @@ public void deleteComment(Long postId, Long commentId, String writerStudentNumbe
     }
 
     @Override
+    @Transactional(readOnly = true)
     public Page<CommentView> getComments(Long postId, Pageable pageable) {
         Post post = postRepository.findById(postId)
                 .orElseThrow(PostNotFoundException::new);
@@ -262,6 +266,7 @@ public void deleteReply(Long postId, Long commentId, Long replyId, String writer
     }
 
     @Override
+    @Transactional(readOnly = true)
     public Page<ReplyView> getReplies(Long postId, Long commentId, Pageable pageable) {
         Comment comment = commentRepository.findById(commentId)
                 .orElseThrow(CommentNotFoundException::new);