[Fix] 회원탈퇴 로직 오류 수정

src/main/java/com/WhoIsRoom/WhoIs_Server/domain/member/repository/MemberRepository.java

@@ -25,4 +25,10 @@ public interface MemberRepository extends JpaRepository<Member, Long> {
     Optional<Member> findByUserAndClub(User user, Club club);
     List<Member> findByUser(User user);
     List<Member> findAllByClubAndIsExistTrue(Club club);
+
+    @Modifying(clearAutomatically = true, flushAutomatically = true)
+    @Query("delete from Member m where m.user.id = :userId")
+    void deleteByUserId(@Param("userId") Long userId);
+
+    boolean existsByUserId(Long userId);
 }

src/main/java/com/WhoIsRoom/WhoIs_Server/domain/user/service/UserService.java

@@ -25,6 +25,8 @@
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.support.TransactionSynchronization;
+import org.springframework.transaction.support.TransactionSynchronizationManager;
 
 import java.net.http.HttpRequest;
 import java.util.*;
@@ -178,17 +180,25 @@ private void validateClubExistence(Set<Long> clubIds) {
         }
     }
 
+    @Transactional
     public void deleteAccount (HttpServletRequest request, Long userId) {
         User user = userRepository.findById(userId)
                 .orElseThrow(() -> new BusinessException(ErrorCode.USER_NOT_FOUND));
 
+        if (memberRepository.existsByUserId(userId)) {
+            memberRepository.deleteByUserId(userId);
+        }
+
         userRepository.delete(user);
 
         String accessToken = jwtUtil.extractAccessToken(request)
                 .orElseThrow(() -> new CustomAuthenticationException(ErrorCode.SECURITY_INVALID_ACCESS_TOKEN));
-        if (accessToken != null) {
-            jwtService.invalidAccessToken(accessToken); // Redis에 blacklist 저장
-        }
+        TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() {
+            @Override
+            public void afterCommit() {
+                jwtService.invalidAccessToken(accessToken);
+            }
+        });
 
         SecurityContextHolder.clearContext();
     }