fix: 외래키로 인해 물리적 탈퇴가 되지 않는 문제 수정

src/main/java/com/example/solidconnection/chat/repository/ChatMessageRepository.java

@@ -65,4 +65,13 @@ WHERE cm.id IN (SELECT r.target_id FROM report r WHERE r.target_type = 'CHAT')
                    AND cm.sender_id IN (SELECT cp.id FROM chat_participant cp WHERE cp.site_user_id IN :siteUserIds)
                    """, nativeQuery = true)
     void bulkUpdateReportedChatMessagesIsDeleted(@Param("siteUserIds") List<Long> siteUserIds, @Param("isDeleted") boolean isDeleted);
+
+    @Modifying(clearAutomatically = true, flushAutomatically = true)
+    @Query(value = """
+                       UPDATE chat_message cm SET cm.is_deleted = false
+                       WHERE cm.chat_room_id IN :chatRoomIds
+                   """, nativeQuery = true)
+    void unmarkDeletedByChatRoomIdIn(@Param("chatRoomIds") List<Long> chatRoomIds);
+
+    void deleteAllByChatRoomIdIn(List<Long> chatRoomIds);
 }

src/main/java/com/example/solidconnection/chat/repository/ChatParticipantRepository.java

@@ -13,8 +13,8 @@ public interface ChatParticipantRepository extends JpaRepository<ChatParticipant
 
     Optional<ChatParticipant> findByChatRoomIdAndSiteUserId(long chatRoomId, long siteUserId);
 
-    void deleteAllBySiteUserId(long siteUserId);
+    void deleteAllByChatRoomIdIn(List<Long> chatRoomIds);
 
-    @Query("SELECT cp.id FROM ChatParticipant cp WHERE cp.siteUserId = :siteUserId")
-    List<Long> findAllIdsBySiteUserId(@Param("siteUserId") long siteUserId);
+    @Query("SELECT cp.chatRoom.id FROM ChatParticipant cp WHERE cp.siteUserId = :siteUserId")
+    List<Long> findAllChatRoomIdsBySiteUserId(@Param("siteUserId") long siteUserId);
 }

src/main/java/com/example/solidconnection/chat/repository/ChatReadStatusRepository.java

@@ -17,5 +17,5 @@ INSERT INTO chat_read_status (chat_room_id, chat_participant_id, created_at, upd
                    """, nativeQuery = true)
     void upsertReadStatus(@Param("chatRoomId") long chatRoomId, @Param("chatParticipantId") long chatParticipantId);
 
-    void deleteAllByChatParticipantIdIn(List<Long> chatParticipantIds);
+    void deleteAllByChatRoomIdIn(List<Long> chatRoomIds);
 }

src/main/java/com/example/solidconnection/community/post/repository/PostRepository.java

@@ -76,5 +76,12 @@ default Post getById(Long id) {
                 .orElseThrow(() -> new CustomException(INVALID_POST_ID));
     }
 
+    @Modifying(clearAutomatically = true, flushAutomatically = true)
+    @Query(value = """
+                       UPDATE post p SET p.is_deleted = false
+                       WHERE p.site_user_id = :siteUserId
+                   """, nativeQuery = true)
+    void unmarkDeletedBySiteUserId(@Param("siteUserId") long siteUserId);
+
     void deleteAllBySiteUserId(long siteUserId);
 }

src/main/java/com/example/solidconnection/mentor/repository/MentorRepository.java

@@ -28,5 +28,8 @@ public interface MentorRepository extends JpaRepository<Mentor, Long> {
 
     List<Mentor> findAllBySiteUserIdIn(Set<Long> siteUserIds);
 
+    @Query("SELECT m.id FROM Mentor m WHERE m.siteUserId = :siteUserId")
+    List<Long> findAllIdsBySiteUserId(@Param("siteUserId") long siteUserId);
+
     void deleteAllBySiteUserId(long siteUserId);
 }

src/main/java/com/example/solidconnection/mentor/repository/MentoringRepository.java

@@ -41,4 +41,6 @@ public interface MentoringRepository extends JpaRepository<Mentoring, Long> {
     Slice<Mentoring> findApprovedMentoringsByMenteeId(long menteeId, @Param("verifyStatus") VerifyStatus verifyStatus, Pageable pageable);
 
     void deleteAllByMenteeId(long menteeId);
+
+    void deleteAllByMentorIdIn(List<Long> mentorIds);
 }

src/main/java/com/example/solidconnection/news/repository/LikedNewsRepository.java

@@ -1,6 +1,7 @@
 package com.example.solidconnection.news.repository;
 
 import com.example.solidconnection.news.domain.LikedNews;
+import java.util.List;
 import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 
@@ -11,4 +12,6 @@ public interface LikedNewsRepository extends JpaRepository<LikedNews, Long> {
     Optional<LikedNews> findByNewsIdAndSiteUserId(long newsId, long siteUserId);
 
     void deleteAllBySiteUserId(long siteUserId);
+
+    void deleteAllByNewsIdIn(List<Long> newsIds);
 }

src/main/java/com/example/solidconnection/news/repository/NewsRepository.java

@@ -4,12 +4,17 @@
 import com.example.solidconnection.news.repository.custom.NewsCustomRepository;
 import java.util.List;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
 public interface NewsRepository extends JpaRepository<News, Long>, NewsCustomRepository {
 
     List<News> findAllByOrderByUpdatedAtDesc();
 
     List<News> findAllBySiteUserIdOrderByUpdatedAtDesc(long siteUserId);
 
+    @Query("SELECT n.id FROM News n WHERE n.siteUserId = :siteUserId")
+    List<Long> findAllIdsBySiteUserId(@Param("siteUserId") long siteUserId);
+
     void deleteAllBySiteUserId(long siteUserId);
 }

src/main/java/com/example/solidconnection/s3/service/S3Service.java

@@ -134,6 +134,9 @@ public void deleteExProfile(long siteUserId) {
         SiteUser siteUser = siteUserRepository.findById(siteUserId)
                 .orElseThrow(() -> new CustomException(USER_NOT_FOUND));
         String key = siteUser.getProfileImageUrl();
+        if (key == null || key.isBlank()) {
+            return;
+        }
         deleteFile(key);
     }
 

src/main/java/com/example/solidconnection/scheduler/UserRemovalScheduler.java

@@ -1,8 +1,10 @@
 package com.example.solidconnection.scheduler;
 
 import com.example.solidconnection.application.repository.ApplicationRepository;
+import com.example.solidconnection.chat.repository.ChatMessageRepository;
 import com.example.solidconnection.chat.repository.ChatParticipantRepository;
 import com.example.solidconnection.chat.repository.ChatReadStatusRepository;
+import com.example.solidconnection.chat.repository.ChatRoomRepository;
 import com.example.solidconnection.community.comment.repository.CommentRepository;
 import com.example.solidconnection.community.post.repository.PostLikeRepository;
 import com.example.solidconnection.community.post.repository.PostRepository;
@@ -19,6 +21,7 @@
 import com.example.solidconnection.score.repository.LanguageTestScoreRepository;
 import com.example.solidconnection.siteuser.domain.SiteUser;
 import com.example.solidconnection.siteuser.repository.SiteUserRepository;
+import com.example.solidconnection.siteuser.repository.UserBanRepository;
 import com.example.solidconnection.siteuser.repository.UserBlockRepository;
 import com.example.solidconnection.university.repository.LikedUnivApplyInfoRepository;
 import java.time.LocalDate;
@@ -49,10 +52,13 @@ public class UserRemovalScheduler {
     private final MentoringRepository mentoringRepository;
     private final NewsRepository newsRepository;
     private final LikedNewsRepository likedNewsRepository;
+    private final ChatRoomRepository chatRoomRepository;
     private final ChatParticipantRepository chatParticipantRepository;
+    private final ChatMessageRepository chatMessageRepository;
     private final ChatReadStatusRepository chatReadStatusRepository;
     private final ReportRepository reportRepository;
     private final UserBlockRepository userBlockRepository;
+    private final UserBanRepository userBanRepository;
     private final MentorApplicationRepository mentorApplicationRepository;
     private final S3Service s3Service;
 
@@ -72,21 +78,19 @@ private void deleteUserAndRelatedData(SiteUser user) {
         long siteUserId = user.getId();
 
         likedNewsRepository.deleteAllBySiteUserId(siteUserId);
-        newsRepository.deleteAllBySiteUserId(siteUserId);
+        deleteNews(siteUserId);
 
         postLikeRepository.deleteAllBySiteUserId(siteUserId);
         commentRepository.deleteAllBySiteUserId(siteUserId);
-        postRepository.deleteAllBySiteUserId(siteUserId);
+        deletePosts(siteUserId);
 
-        mentoringRepository.deleteAllByMenteeId(siteUserId);
-        mentorRepository.deleteAllBySiteUserId(siteUserId);
+        deleteChatRooms(siteUserId);
+        deleteMentorings(siteUserId);
         mentorApplicationRepository.deleteAllBySiteUserId(siteUserId);
 
-        List<Long> chatParticipantIds = chatParticipantRepository.findAllIdsBySiteUserId(siteUserId);
-        chatReadStatusRepository.deleteAllByChatParticipantIdIn(chatParticipantIds);
-        chatParticipantRepository.deleteAllBySiteUserId(siteUserId);
         reportRepository.deleteAllByReporterId(siteUserId);
         userBlockRepository.deleteAllByBlockerIdOrBlockedId(siteUserId, siteUserId);
+        deleteUserBans(siteUserId);
 
         applicationRepository.deleteAllBySiteUserId(siteUserId);
         gpaScoreRepository.deleteAllBySiteUserId(siteUserId);
@@ -99,4 +103,62 @@ private void deleteUserAndRelatedData(SiteUser user) {
 
         siteUserRepository.delete(user);
     }
+
+    /*
+     * 다른 사용자가 누른 좋아요가 남아 있으면 뉴스를 삭제할 수 없으므로 함께 삭제한다.
+     * */
+    private void deleteNews(long siteUserId) {
+        List<Long> newsIds = newsRepository.findAllIdsBySiteUserId(siteUserId);
+        if (!newsIds.isEmpty()) {
+            likedNewsRepository.deleteAllByNewsIdIn(newsIds);
+        }
+        newsRepository.deleteAllBySiteUserId(siteUserId);
+    }
+
+    /*
+     * 신고로 가려진 게시글은 조회 필터에 걸려 삭제되지 않으므로, 플래그를 되돌린 뒤 삭제한다.
+     * */
+    private void deletePosts(long siteUserId) {
+        postRepository.unmarkDeletedBySiteUserId(siteUserId);
+        postRepository.deleteAllBySiteUserId(siteUserId);
+    }
+
+    /*
+     * 1:1 채팅방은 참여자 한 명이 사라지면 유지될 수 없으므로 방 전체를 삭제한다.
+     * - 신고로 가려진 메시지는 조회 필터에 걸리므로, 플래그를 되돌린 뒤 삭제한다.
+     * - 채팅방이 멘토링을 참조하므로 멘토링보다 먼저 삭제한다.
+     * */
+    private void deleteChatRooms(long siteUserId) {
+        List<Long> chatRoomIds = chatParticipantRepository.findAllChatRoomIdsBySiteUserId(siteUserId);
+        if (chatRoomIds.isEmpty()) {
+            return;
+        }
+        chatMessageRepository.unmarkDeletedByChatRoomIdIn(chatRoomIds);
+        chatMessageRepository.deleteAllByChatRoomIdIn(chatRoomIds);
+        chatReadStatusRepository.deleteAllByChatRoomIdIn(chatRoomIds);
+        chatParticipantRepository.deleteAllByChatRoomIdIn(chatRoomIds);
+        chatRoomRepository.deleteAllById(chatRoomIds);
+    }
+
+    /*
+     * 멘티로 참여한 멘토링과 멘토로 참여한 멘토링을 모두 삭제한 뒤 멘토를 삭제한다.
+     * */
+    private void deleteMentorings(long siteUserId) {
+        mentoringRepository.deleteAllByMenteeId(siteUserId);
+        List<Long> mentorIds = mentorRepository.findAllIdsBySiteUserId(siteUserId);
+        if (!mentorIds.isEmpty()) {
+            mentoringRepository.deleteAllByMentorIdIn(mentorIds);
+        }
+        mentorRepository.deleteAllBySiteUserId(siteUserId);
+    }
+
+    /*
+     * 탈퇴자를 대상으로 한 정지 기록은 삭제한다.
+     * 탈퇴자가 집행한 정지 기록은 다른 사용자의 이력이므로, 집행자 참조만 해제하고 보존한다.
+     * */
+    private void deleteUserBans(long siteUserId) {
+        userBanRepository.deleteAllByBannedUserId(siteUserId);
+        userBanRepository.clearBannedBy(siteUserId);
+        userBanRepository.clearUnbannedBy(siteUserId);
+    }
 }

src/main/java/com/example/solidconnection/siteuser/domain/UserBan.java

@@ -27,7 +27,7 @@ public class UserBan extends BaseEntity {
     @Column(name = "banned_user_id", nullable = false)
     private Long bannedUserId;
 
-    @Column(name = "banned_by", nullable = false)
+    @Column(name = "banned_by")
     private Long bannedBy;
 
     @Column(name = "duration", nullable = false)

src/main/java/com/example/solidconnection/siteuser/repository/UserBanRepository.java

@@ -21,4 +21,14 @@ public interface UserBanRepository extends JpaRepository<UserBan, Long> {
     @Modifying
     @Query("UPDATE UserBan ub SET ub.isExpired = true WHERE ub.isExpired = false AND ub.expiredAt < :current")
     void bulkExpireUserBans(@Param("current") ZonedDateTime current);
+
+    void deleteAllByBannedUserId(long bannedUserId);
+
+    @Modifying(clearAutomatically = true, flushAutomatically = true)
+    @Query("UPDATE UserBan ub SET ub.bannedBy = null WHERE ub.bannedBy = :siteUserId")
+    void clearBannedBy(@Param("siteUserId") long siteUserId);
+
+    @Modifying(clearAutomatically = true, flushAutomatically = true)
+    @Query("UPDATE UserBan ub SET ub.unbannedBy = null WHERE ub.unbannedBy = :siteUserId")
+    void clearUnbannedBy(@Param("siteUserId") long siteUserId);
 }

src/main/resources/db/migration/V60__alter_user_ban_banned_by_nullable.sql

@@ -0,0 +1,2 @@
+ALTER TABLE user_ban
+    MODIFY COLUMN banned_by BIGINT NULL;