feat: 모든 페스티벌 id 조회 api 구현

src/main/java/com/odiga/fiesta/festival/controller/FestivalController.java

@@ -71,6 +71,17 @@ public class FestivalController {
 	private final FestivalService festivalService;
 	private final FestivalBookmarkService festivalBookmarkService;
 
+	@Operation(
+		summary = "모든 페스티벌의 id 조회",
+		description = "DB에 존재하는 모든 페스티벌의 id를 조회합니다."
+	)
+	@GetMapping("/id")
+	public ResponseEntity<BasicResponse<List<Long>>> getAllFestivalIds() {
+		String message = "페스티벌 id 조회 성공";
+		final List<Long> response = festivalService.getAllFestivalIds();
+		return ResponseEntity.ok(BasicResponse.ok(message, response));
+	}
+
 	@Operation(
 		summary = "페스티벌 생성",
 		description = "페스티벌을 생성합니다."

src/main/java/com/odiga/fiesta/festival/repository/FestivalRepository.java

@@ -1,10 +1,16 @@
 package com.odiga.fiesta.festival.repository;
 
+import java.util.List;
+
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 
 import com.odiga.fiesta.festival.domain.Festival;
 
 public interface FestivalRepository extends JpaRepository<Festival, Long>
 	, FestivalCustomRepository {
 	boolean existsByUserId(long userId);
+
+	@Query("SELECT f.id FROM Festival f")
+	List<Long> findAllFestivalIds();
 }

src/main/java/com/odiga/fiesta/festival/service/FestivalService.java

@@ -359,6 +359,10 @@ public FestivalModificationResponse createFestivalRequest(User user, Long festiv
 			.build();
 	}
 
+	public List<Long> getAllFestivalIds() {
+		return festivalRepository.findAllFestivalIds();
+	}
+
 	// 필터링을 위해, request list 내부의 중복 제거
 	private FestivalFilterCondition getFestivalFilterCondition(FestivalFilterRequest festivalFilterRequest) {
 		Optional.ofNullable(festivalFilterRequest.getMonths())
@@ -506,4 +510,5 @@ private void validateFileExtension(List<MultipartFile> files) {
 		}
 	}
 
+
 }

src/main/resources/application-local.yml

@@ -1,7 +1,7 @@
 spring:
   datasource:
     driver-class-name: com.mysql.cj.jdbc.Driver
-    username: admin
+    username: root
     password: fiesta123
     url: jdbc:mysql://localhost:3306/fiesta
   jpa:
@@ -19,4 +19,4 @@ spring:
   data:
     redis:
       host: localhost
-      port: 6379
+      port: 6379

src/test/java/com/odiga/fiesta/festival/service/FestivalServiceTest.java

@@ -939,6 +939,25 @@ void findBookmarkedFestivals_Success() {
 		assertThat(bookmarkedFestivals.getTotalElements()).isEqualTo(bookmarkedFestivalCount);
 	}
 
+	@DisplayName("페스티벌 id조회 - DB에 저장된 모든 페스티벌의 id를 조회한다.")
+	@Test
+	void getAllFestivalIds() {
+		// given
+		Festival festival1 = createFestival();
+		Festival festival2 = createFestival();
+		Festival festival3 = createFestival();
+		Festival festival4 = createFestival();
+		Festival festival5 = createFestival();
+
+		festivalRepository.saveAll(List.of(festival1, festival2, festival3, festival4, festival5));
+
+		// when
+		List<Long> festivalIds = festivalService.getAllFestivalIds();
+
+		// then
+		assertThat(festivalIds).hasSize(5);
+	}
+
 	private static FestivalImage createFestivalImage(Festival festival) {
 		return FestivalImage.builder().festivalId(festival.getId()).imageUrl("imageUrl1").build();
 	}