Refactor: n+1 문제 제거

Author: sso0om

back/src/main/java/com/back/domain/mentoring/reservation/controller/ReservationController.java

@@ -35,7 +35,7 @@ public class ReservationController {
     public RsData<ReservationPagingResponse> getReservations(
         @RequestParam(defaultValue = "0") int page,
         @RequestParam(defaultValue = "10") int size,
-        @RequestParam(required = false)ReservationStatus status
+        @RequestParam(required = false) ReservationStatus status
     ) {
         Member member = rq.getActor();
         Page<ReservationDto> reservationPage = reservationService.getReservations(member, page, size, status);

back/src/main/java/com/back/domain/mentoring/reservation/repository/ReservationRepository.java

@@ -32,6 +32,8 @@ Optional<Reservation> findByIdAndMember(
     @Query("""
         SELECT r
         FROM Reservation r
+        JOIN FETCH r.mentorSlot ms
+        JOIN FETCH r.mentoring
         WHERE r.mentor.member.id = :memberId
         AND (:status IS NULL OR r.status = :status)
         """)
@@ -44,6 +46,8 @@ Page<Reservation> findAllByMentorMember(
     @Query("""
         SELECT r
         FROM Reservation r
+        JOIN FETCH r.mentorSlot ms
+        JOIN FETCH r.mentoring
         WHERE r.mentee.member = :member
         AND (:status IS NULL OR r.status = :status)
         """)