From 5d499956d7a74685282ccc8a5c1ee0f1756d7327 Mon Sep 17 00:00:00 2001
From: Tim <135014430+nagisa77@users.noreply.github.com>
Date: Wed, 17 Sep 2025 13:30:58 +0800
Subject: [PATCH] Delete post change logs before removing posts

---
 .../java/com/openisle/repository/PostChangeLogRepository.java | 2 ++
 .../main/java/com/openisle/service/PostChangeLogService.java  | 4 ++++
 backend/src/main/java/com/openisle/service/PostService.java   | 1 +
 .../src/test/java/com/openisle/service/PostServiceTest.java   | 1 +
 4 files changed, 8 insertions(+)

diff --git a/backend/src/main/java/com/openisle/repository/PostChangeLogRepository.java b/backend/src/main/java/com/openisle/repository/PostChangeLogRepository.java
index c9e700fc0..324ac8506 100644
--- a/backend/src/main/java/com/openisle/repository/PostChangeLogRepository.java
+++ b/backend/src/main/java/com/openisle/repository/PostChangeLogRepository.java
@@ -8,4 +8,6 @@ import java.util.List;
 
 public interface PostChangeLogRepository extends JpaRepository<PostChangeLog, Long> {
     List<PostChangeLog> findByPostOrderByCreatedAtAsc(Post post);
+
+    void deleteByPost(Post post);
 }
diff --git a/backend/src/main/java/com/openisle/service/PostChangeLogService.java b/backend/src/main/java/com/openisle/service/PostChangeLogService.java
index aeb6c2bc5..ec15508d1 100644
--- a/backend/src/main/java/com/openisle/service/PostChangeLogService.java
+++ b/backend/src/main/java/com/openisle/service/PostChangeLogService.java
@@ -109,6 +109,10 @@ public class PostChangeLogService {
         logRepository.save(log);
     }
 
+    public void deleteLogsForPost(Post post) {
+        logRepository.deleteByPost(post);
+    }
+
     public List<PostChangeLog> listLogs(Long postId) {
         Post post = postRepository.findById(postId)
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
diff --git a/backend/src/main/java/com/openisle/service/PostService.java b/backend/src/main/java/com/openisle/service/PostService.java
index daddffe5e..a948bf801 100644
--- a/backend/src/main/java/com/openisle/service/PostService.java
+++ b/backend/src/main/java/com/openisle/service/PostService.java
@@ -888,6 +888,7 @@ public class PostService {
             }
         }
         String title = post.getTitle();
+        postChangeLogService.deleteLogsForPost(post);
         postRepository.delete(post);
         if (adminDeleting) {
             notificationService.createNotification(author, NotificationType.POST_DELETED,
diff --git a/backend/src/test/java/com/openisle/service/PostServiceTest.java b/backend/src/test/java/com/openisle/service/PostServiceTest.java
index 46efaa5c0..b6997d59e 100644
--- a/backend/src/test/java/com/openisle/service/PostServiceTest.java
+++ b/backend/src/test/java/com/openisle/service/PostServiceTest.java
@@ -71,6 +71,7 @@ class PostServiceTest {
 
         verify(postReadService).deleteByPost(post);
         verify(postRepo).delete(post);
+        verify(postChangeLogService).deleteLogsForPost(post);
     }
 
     @Test