[hotfix] fix: 닉네임 똑같은 경우, 닉네임 중복 체크 안하도록 수정

- validateDuplicateNickname함수를 오버로딩하여 사용

src/main/java/org/recordy/server/user/service/UserService.java

@@ -22,6 +22,7 @@ public interface UserService {
     // query
     UserProfile getProfile(long targetUserId, long userId);
     void validateDuplicateNickname(String nickname);
+    void validateDuplicateNickname(User user, String nickname);
     Slice<UserInfo> getSubscribingUserInfos(long userId, Long cursor, int size);
     Slice<UserInfo> getSubscribedUserInfos(long userId, Long cursor, int size);
 }

src/main/java/org/recordy/server/user/service/impl/UserServiceImpl.java

@@ -119,9 +119,9 @@ public void signOut(long userId) {
     @Transactional
     @Override
     public void update(UserUpdate update, long id) {
-        validateDuplicateNickname(update.nickname());
 
         User user = userRepository.findById(id);
+        validateDuplicateNickname(user, update.nickname());
         user.update(update);
 
         userRepository.save(user);
@@ -151,6 +151,13 @@ public void validateDuplicateNickname(String nickname) {
         }
     }
 
+    @Override
+    public void validateDuplicateNickname(User user, String nickname) {
+        if (!user.getNickname().equals(nickname) && userRepository.existsByNickname(nickname)) {
+            throw new UserException(ErrorMessage.DUPLICATE_NICKNAME);
+        }
+    }
+
     @Override
     public Slice<UserInfo> getSubscribingUserInfos(long userId, Long cursor, int size) {
         return userRepository.findFollowings(userId, cursor, size);