refactor: CheerService 에서 SQL 쿼리 횟수 최적화

Author: leegwichan

src/main/java/eatda/repository/cheer/CheerRepository.java

@@ -13,11 +13,11 @@
 
 public interface CheerRepository extends JpaRepository<Cheer, Long> {
 
-    @EntityGraph(attributePaths = {"store", "member", "cheerTags"})
+    @EntityGraph(attributePaths = {"store", "member", "cheerTags.values"})
     List<Cheer> findAllByOrderByCreatedAtDesc(Pageable pageable);
 
-    @EntityGraph(attributePaths = {"member", "cheerTags"})
-    List<Cheer> findAllByStoreOrderByCreatedAtDesc(Store store, Pageable pageable);
+    @EntityGraph(attributePaths = {"member", "cheerTags.values"})
+    List<Cheer> findAllByStoreIdOrderByCreatedAtDesc(Long storeId, Pageable pageable);
 
     @Query("""
             SELECT c.imageKey FROM Cheer c

src/main/java/eatda/service/cheer/CheerService.java

@@ -75,12 +75,11 @@ private CheersResponse toCheersResponse(List<Cheer> cheers) {
 
     @Transactional(readOnly = true)
     public CheersInStoreResponse getCheersByStoreId(Long storeId, int page, int size) {
-        Store store = storeRepository.getById(storeId);
-        List<Cheer> cheers = cheerRepository.findAllByStoreOrderByCreatedAtDesc(store, PageRequest.of(page, size));
+        List<Cheer> cheers = cheerRepository.findAllByStoreIdOrderByCreatedAtDesc(storeId, PageRequest.of(page, size));
 
         List<CheerInStoreResponse> cheersResponse = cheers.stream()
                 .map(CheerInStoreResponse::new)
-                .toList(); // TODO N+1 문제 해결
+                .toList();
         return new CheersInStoreResponse(cheersResponse);
     }
 }