From c848678bf97bbbe5f917a873b3a44ebe81b9b55e Mon Sep 17 00:00:00 2001
From: yeoEun <kye020923@g.hongik.ac.kr>
Date: Sun, 9 Nov 2025 20:35:08 +0900
Subject: [PATCH] Fix/applicantCount

---
 .../chainee/repository/JobPostRepository.java  | 18 ++++++++++++++++--
 .../chainee/service/JobApplicationService.java |  2 +-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/main/java/com/chaineeproject/chainee/repository/JobPostRepository.java b/src/main/java/com/chaineeproject/chainee/repository/JobPostRepository.java
index ba01ffe..76e3fb7 100644
--- a/src/main/java/com/chaineeproject/chainee/repository/JobPostRepository.java
+++ b/src/main/java/com/chaineeproject/chainee/repository/JobPostRepository.java
@@ -17,9 +17,23 @@ public interface JobPostRepository extends JpaRepository<JobPost, Long> {
     @EntityGraph(attributePaths = {"author", "author.positions"})
     Optional<JobPost> findById(Long id);
 
+    // 🔁 (삭제) 증분 방식
+    // @Modifying(clearAutomatically = true, flushAutomatically = true)
+    // @Query("update JobPost p set p.applicantCount = p.applicantCount + 1 where p.id = :postId")
+    // int incrementApplicantCount(@Param("postId") Long postId);
+
+    // ✅ 항상 실제 건수로 동기화(네이티브 쿼리)
     @Modifying(clearAutomatically = true, flushAutomatically = true)
-    @Query("update JobPost p set p.applicantCount = p.applicantCount + 1 where p.id = :postId")
-    int incrementApplicantCount(Long postId);
+    @Query(value = """
+        UPDATE job_post p
+        SET p.applicant_count = (
+          SELECT COUNT(*)
+          FROM job_application a
+          WHERE a.post_id = :postId
+        )
+        WHERE p.id = :postId
+        """, nativeQuery = true)
+    int syncApplicantCount(@Param("postId") Long postId);
 
     @Query("""
         select jp
diff --git a/src/main/java/com/chaineeproject/chainee/service/JobApplicationService.java b/src/main/java/com/chaineeproject/chainee/service/JobApplicationService.java
index 2a2dbce..df89c53 100644
--- a/src/main/java/com/chaineeproject/chainee/service/JobApplicationService.java
+++ b/src/main/java/com/chaineeproject/chainee/service/JobApplicationService.java
@@ -52,7 +52,7 @@ public void applyToJob(Long postId, Long applicantId, Long resumeId) {
         application.setCreatedAt(LocalDateTime.now());
         jobApplicationRepository.save(application);
 
-        jobPostRepository.incrementApplicantCount(postId);
+        jobPostRepository.syncApplicantCount(postId);
 
         // ✅ 지원 저장 직후 바로 알림 생성 (이벤트/트랜잭션 훅 의존 X)
         Notification noti = Notification.builder()