From feaa2230f55ae472fc3876ea4b305d22a48f9c27 Mon Sep 17 00:00:00 2001
From: jae-2024 <dbswotkd2019@naver.com>
Date: Sun, 8 Mar 2026 22:15:38 +0900
Subject: [PATCH] =?UTF-8?q?[#61]=20Refactor:=20commentSystem=EC=97=90=20?=
 =?UTF-8?q?=EC=B0=B8=EA=B0=80id=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

---
 .../domain/comment/dto/response/CommentResponse.java  |  2 ++
 .../Mua_backend/domain/comment/entity/Comment.java    | 11 +++++++++--
 .../domain/comment/service/CommentService.java        |  4 ++--
 .../participation/service/ParticipationService.java   |  2 +-
 4 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/main/java/Mua/Mua_backend/domain/comment/dto/response/CommentResponse.java b/src/main/java/Mua/Mua_backend/domain/comment/dto/response/CommentResponse.java
index 1cf377f..8e43d51 100644
--- a/src/main/java/Mua/Mua_backend/domain/comment/dto/response/CommentResponse.java
+++ b/src/main/java/Mua/Mua_backend/domain/comment/dto/response/CommentResponse.java
@@ -9,6 +9,7 @@
 public record CommentResponse(
         Long commentId,
         Long feedId,
+        Long participationId,
         String description,
         Long parentId,
         Integer depth,
@@ -22,6 +23,7 @@ public static CommentResponse from(Comment comment) {
         return new CommentResponse(
                 comment.getId(),
                 comment.getFeed().getId(),
+                comment.getParticipationId(),
                 comment.getDescription(),
                 comment.getParentId(),
                 comment.getDepth(),
diff --git a/src/main/java/Mua/Mua_backend/domain/comment/entity/Comment.java b/src/main/java/Mua/Mua_backend/domain/comment/entity/Comment.java
index 83c4c54..3980215 100644
--- a/src/main/java/Mua/Mua_backend/domain/comment/entity/Comment.java
+++ b/src/main/java/Mua/Mua_backend/domain/comment/entity/Comment.java
@@ -53,6 +53,9 @@ public class Comment extends BaseTimeEntity {
     @Column(name = "is_deleted", nullable = false)
     private boolean isDeleted = false;
 
+    @Column(name = "participation_id")
+    private Long participationId;
+
     @Builder(access = AccessLevel.PRIVATE)
     private Comment(
             String description,
@@ -60,7 +63,8 @@ private Comment(
             Integer depth,
             CommentType commentType,
             Member member,
-            Feed feed
+            Feed feed,
+            Long participationId
     ) {
         this.description = description;
         this.parentId = parentId;
@@ -68,6 +72,7 @@ private Comment(
         this.commentType = commentType;
         this.member = member;
         this.feed = feed;
+        this.participationId = participationId;
     }
 
     // USER 댓글 생성
@@ -90,7 +95,8 @@ public static Comment createUserComment(
     // SYSTEM 댓글 생성
     public static Comment createSystemComment(
             String description,
-            Feed feed
+            Feed feed,
+            Long participationId
     ) {
         return Comment.builder()
                 .description(description)
@@ -99,6 +105,7 @@ public static Comment createSystemComment(
                 .commentType(CommentType.SYSTEM)
                 .member(null)
                 .feed(feed)
+                .participationId(participationId)
                 .build();
     }
 
diff --git a/src/main/java/Mua/Mua_backend/domain/comment/service/CommentService.java b/src/main/java/Mua/Mua_backend/domain/comment/service/CommentService.java
index 0d49caf..a3c301b 100644
--- a/src/main/java/Mua/Mua_backend/domain/comment/service/CommentService.java
+++ b/src/main/java/Mua/Mua_backend/domain/comment/service/CommentService.java
@@ -84,11 +84,11 @@ public List<CommentResponse> getComments(Long feedId) {
     }
 
     // 시스템 댓글 생성
-    public void createSystemComment(Long feedId, String message) {
+    public void createSystemComment(Long feedId, String message, Long participationId) {
         Feed feed = feedRepository.findById(feedId)
                 .orElseThrow(() -> new IllegalArgumentException("피드가 존재하지 않습니다."));
 
-        Comment comment = Comment.createSystemComment(message, feed);
+        Comment comment = Comment.createSystemComment(message, feed, participationId);
         commentRepository.save(comment);
     }
 
diff --git a/src/main/java/Mua/Mua_backend/domain/participation/service/ParticipationService.java b/src/main/java/Mua/Mua_backend/domain/participation/service/ParticipationService.java
index 5699ec7..4682e8a 100644
--- a/src/main/java/Mua/Mua_backend/domain/participation/service/ParticipationService.java
+++ b/src/main/java/Mua/Mua_backend/domain/participation/service/ParticipationService.java
@@ -56,7 +56,7 @@ public void apply(Long feedId, Member member) {
         participationRepository.save(participation);
 
         String message = member.getNickname() + "님이 참가 신청했습니다.";
-        commentService.createSystemComment(feed.getId(), message);
+        commentService.createSystemComment(feed.getId(), message, participation.getId());
     }
 
     // 참가자 전체 조회