🐛 [FIX] Grade 조회 로직 수정

src/main/java/org/withtime/be/withtimebe/domain/member/repository/GradeRepository.java

@@ -1,21 +1,7 @@
 package org.withtime.be.withtimebe.domain.member.repository;
 
-import java.util.Optional;
-
 import org.springframework.data.jpa.repository.JpaRepository;
-import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.query.Param;
 import org.withtime.be.withtimebe.domain.member.entity.Grade;
 
 public interface GradeRepository extends JpaRepository<Grade, Long> {
-
-	@Query("SELECT g FROM Grade g " +
-		"WHERE g.requiredPoint <= :point " +
-		"ORDER BY g.requiredPoint DESC")
-	Optional<Grade> findCurrentGrade(@Param("point") int point);
-
-	@Query("SELECT g FROM Grade g " +
-		"WHERE g.requiredPoint > :point " +
-		"ORDER BY g.requiredPoint ASC")
-	Optional<Grade> findNextGrade(@Param("point") int point);
 }

src/main/java/org/withtime/be/withtimebe/domain/member/service/query/GradeQueryServiceImpl.java

@@ -1,5 +1,8 @@
 package org.withtime.be.withtimebe.domain.member.service.query;
 
+import java.util.Comparator;
+import java.util.List;
+
 import org.springframework.stereotype.Service;
 import org.springframework.web.ErrorResponseException;
 import org.withtime.be.withtimebe.domain.member.converter.GradeConverter;
@@ -23,10 +26,21 @@ public GradeResponseDTO.FindMyGrade findMyGrade(Member member) {
 
 		int currentPoint = member.getPoint();
 
-		Grade currentGrade = gradeRepository.findCurrentGrade(currentPoint)
+		List<Grade> gradeList = gradeRepository.findAll();
+
+		// 필요 포인트 기준 오름차순 정렬
+		gradeList.sort(Comparator.comparingInt(Grade::getRequiredPoint));
+
+		// 현재 Grade
+		Grade currentGrade = gradeList.stream()
+			.filter(g -> g.getRequiredPoint() <= currentPoint)
+			.max(Comparator.comparingInt(Grade::getRequiredPoint))
 			.orElseThrow(() -> new GradeException(GradeErrorCode.GRADE_NOT_FOUND));
 
-		Grade nextGrade = gradeRepository.findNextGrade(currentPoint)
+		// 다음 Grade
+		Grade nextGrade = gradeList.stream()
+			.filter(g -> g.getRequiredPoint() > currentPoint)
+			.findFirst()
 			.orElse(null);
 
 		return GradeConverter.toFindMyGrade(member, currentGrade, nextGrade);