fix: 로그인 문제 해결 (#339)

Co-authored-by: 나용준 <141994188+youngJun99@users.noreply.github.com>

Author: yongjun0511

src/main/java/ssu/eatssu/domain/auth/security/CustomUserDetailsService.java

@@ -17,9 +17,10 @@ public class CustomUserDetailsService implements UserDetailsService {
 
     private final UserRepository userRepository;
 
+    // OrderByIdAsc로 해줌으로써 처음 생성된 계정으로 연결된다.
     @Override
     public UserDetails loadUserByUsername(String username) {
-        User user = userRepository.findByEmail(username)
+        User user = userRepository.findFirstByEmailOrderByIdAsc(username)
                                   .orElseThrow(() -> new BaseException(BaseResponseStatus.NOT_FOUND_USER));
         return new CustomUserDetails(user);
     }

src/main/java/ssu/eatssu/domain/auth/service/OAuthService.java

@@ -34,7 +34,8 @@ public class OAuthService {
 
     public Tokens kakaoLogin(KakaoLoginRequest request) {
         User user = userRepository.findByProviderId(request.providerId())
-                                  .orElseGet(() -> userService.join(request.email(), KAKAO, request.providerId()));
+                                  .orElseGet(() -> userRepository.findFirstByEmailOrderByIdAsc(request.email())
+                                          .orElseGet(() -> userService.join(request.email(), KAKAO, request.providerId())));
 
         return generateOauthJwtTokens(user.getEmail(), KAKAO, request.providerId());
     }
@@ -44,7 +45,8 @@ public Tokens kakaoLogin(KakaoLoginRequest request) {
      */
     public Tokens kakaoLoginV2(KakaoLoginRequestV2 request) {
         User user = userRepository.findByProviderId(request.providerId())
-                .orElseGet(() -> userService.joinV2(request.email(), KAKAO, request.providerId(),request.deviceType()));
+                .orElseGet(() -> userRepository.findFirstByEmailOrderByIdAsc(request.email())
+                        .orElseGet(() -> userService.joinV2(request.email(), KAKAO, request.providerId(),request.deviceType())));
 
         user.updateDeviceType(request.deviceType());
 
@@ -57,7 +59,8 @@ public Tokens appleLogin(AppleLoginRequest request) {
         OAuthInfo oAuthInfo = appleAuthenticator.getOAuthInfoByIdentityToken(request.identityToken());
 
         User user = userRepository.findByProviderId(oAuthInfo.providerId())
-                                  .orElseGet(() -> userService.join(oAuthInfo.email(), APPLE, oAuthInfo.providerId()));
+                                  .orElseGet(() -> userRepository.findFirstByEmailOrderByIdAsc(oAuthInfo.email())
+                                          .orElseGet(() -> userService.join(oAuthInfo.email(), APPLE, oAuthInfo.providerId())));
 
         updateAppleUserEmail(user, oAuthInfo.email());
 
@@ -71,7 +74,8 @@ public Tokens appleLoginV2(AppleLoginRequestV2 request) {
         OAuthInfo oAuthInfo = appleAuthenticator.getOAuthInfoByIdentityToken(request.identityToken());
 
         User user = userRepository.findByProviderId(oAuthInfo.providerId())
-                .orElseGet(() -> userService.joinV2(oAuthInfo.email(), APPLE, oAuthInfo.providerId(),request.deviceType()));
+                .orElseGet(() -> userRepository.findFirstByEmailOrderByIdAsc(oAuthInfo.email())
+                        .orElseGet(() -> userService.joinV2(oAuthInfo.email(), APPLE, oAuthInfo.providerId(),request.deviceType())));
 
         updateAppleUserEmail(user, oAuthInfo.email());
 

src/main/java/ssu/eatssu/domain/user/repository/UserRepository.java

@@ -13,9 +13,7 @@ public interface UserRepository extends JpaRepository<User, Long> {
 
     boolean existsByNickname(String nickname);
 
-    Optional<User> findByEmail(String email);
-
     Optional<User> findByProviderId(String providerId);
 
-    Optional<User> findByNickname(String nickname);
+    Optional<User> findFirstByEmailOrderByIdAsc(String email);
 }