From 59b6b251db137360ec9ca1c3b9b4079205768aa1 Mon Sep 17 00:00:00 2001
From: ikmkj <1@qq,com>
Date: Fri, 25 Jul 2025 21:59:50 +0800
Subject: [PATCH] =?UTF-8?q?refactor(music-houduan):=20=E4=BC=98=E5=8C=96?=
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- 引入 Optional 类以提高代码的可读性和健壮性
- 使用 countByTargetIdAndTargetType 方法直接统计评论数量，避免不必要的更新操作
- 添加类型判断，确保只处理音乐类型的评论
---
 .../service/impl/CommentServiceImpl.java          | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/music-houduan/src/main/java/com/test/musichouduan/service/impl/CommentServiceImpl.java b/music-houduan/src/main/java/com/test/musichouduan/service/impl/CommentServiceImpl.java
index 2ae5398..412ed2e 100644
--- a/music-houduan/src/main/java/com/test/musichouduan/service/impl/CommentServiceImpl.java
+++ b/music-houduan/src/main/java/com/test/musichouduan/service/impl/CommentServiceImpl.java
@@ -5,6 +5,7 @@ import com.test.musichouduan.dto.CommentDTO;
 import com.test.musichouduan.dto.PageResult;
 import com.test.musichouduan.dto.UserDTO;
 import com.test.musichouduan.entity.Comment;
+import com.test.musichouduan.entity.Music;
 import com.test.musichouduan.entity.User;
 import com.test.musichouduan.exception.BusinessException;
 import com.test.musichouduan.repository.CommentRepository;
@@ -25,6 +26,7 @@ import jakarta.persistence.criteria.Predicate;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Optional;
 import java.util.stream.Collectors;
 
 /**
@@ -104,13 +106,20 @@ public class CommentServiceImpl implements CommentService {
         // 保存评论
         Comment savedComment = commentRepository.save(comment);
 
+
         // 如果评论的是音乐 (targetType=1, 这个值需要与前端约定好)
         // 通常可以定义一个枚举或常量类来管理这些类型值
         if (savedComment.getTargetType() == 1) {
             musicRepository.findById(savedComment.getTargetId()).ifPresent(music -> {
-                int currentCommentCount = music.getCommentCount() != null ? music.getCommentCount() : 0;
-                music.setCommentCount(currentCommentCount + 1);
-                musicRepository.save(music);
+                // 首先判断类型是否等于1
+                if (savedComment.getTargetType() == 1) {
+                    // 查询评论表，使用COUNT(id)统计该音乐的评论数量
+                    long commentCount = commentRepository.countByTargetIdAndTargetType(savedComment.getTargetId(), 1);
+                    // 设置到音乐中
+                    music.setCommentCount((int) commentCount);
+                    // 保存音乐实体
+                    musicRepository.save(music);
+                }
             });
         }