feat: 면접 예약 API InterviewSlotRepository 쿼리 추가

Author: hodoon

src/main/java/dmu/dasom/api/domain/interview/repositoty/InterviewSlotRepository.java

@@ -3,16 +3,24 @@
 import dmu.dasom.api.domain.interview.entity.InterviewSlot;
 import dmu.dasom.api.domain.interview.enums.Status;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
 import java.util.Collection;
 import java.util.List;
 
 @Repository
 public interface InterviewSlotRepository extends JpaRepository<InterviewSlot, Long> {
+    // 현재 인원이 최대 인원보다 작은 슬롯 조회
+    // 현재 예약된 인원이 최대 지원자 수보다 적은 슬롯 조회
+    @Query("SELECT s FROM InterviewSlot s WHERE s.currentCandidates < s.maxCandidates")
     Collection<InterviewSlot> findAllByCurrentCandidatesLessThanMaxCandidates();
-    List<InterviewSlot> findAllByStatusAndCurrentCandidatesLessThanMaxCandidates(
-            Status status);
 
-    boolean exists();
+    // 상태에 따른 슬롯 조회
+    @Query("SELECT s FROM InterviewSlot s WHERE s.status = :status AND s.currentCandidates < s.maxCandidates")
+    List<InterviewSlot> findAllByStatusAndCurrentCandidatesLessThanMaxCandidates(Status status);
+
+    // 슬롯이 하나라도 존재하는지 확인
+    @Query("SELECT COUNT(s) > 0 FROM InterviewSlot s")
+    boolean existsAny();
 }

src/main/java/dmu/dasom/api/domain/interview/service/InterviewServiceImpl.java

@@ -35,7 +35,7 @@ public class InterviewServiceImpl implements InterviewService{
     @Override
     @Transactional
     public List<InterviewSlotResponseDto> createInterviewSlots(LocalDate newStartDate, LocalDate newEndDate, LocalTime newStartTime, LocalTime newEndTime) {
-        boolean slotsExist = interviewSlotRepository.exists();
+        boolean slotsExist = interviewSlotRepository.existsAny();
 
         if(slotsExist){
             interviewSlotRepository.deleteAll();