删除评论对应的数量问题

珞珈岛-项目相关文件/luojia-island/.vscode/launch.json

@@ -0,0 +1,22 @@
+{
+    // 使用 IntelliSense 了解相关属性。 
+    // 悬停以查看现有属性的描述。
+    // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+    {
+        "name": "Launch Edge",
+        "request": "launch",
+        "type": "msedge",
+        "url": "http://localhost:8080",
+        "webRoot": "${workspaceFolder}"
+    },
+        {
+            "type": "msedge",
+            "request": "launch",
+            "name": "针对 localhost 启动 Edge",
+            "url": "http://localhost:8080",
+            "webRoot": "${workspaceFolder}"
+        }
+    ]
+}

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/service/impl/CommentServiceImpl.java

@@ -185,22 +185,42 @@ public class CommentServiceImpl extends ServiceImpl<CommentMapper, Comment> impl
     @Transactional(rollbackFor = Exception.class)
     public void deleteComment(Long id) {
         validatePostUtil.validateCommentOwnership(id);
-        LambdaQueryWrapper<Comment> queryWrapper = Wrappers.lambdaQuery(Comment.class)
-                .eq(Comment::getTopId, id);
-        int delete = commentMapper.delete(queryWrapper);
-        if(delete <= 0) {
-            throw new PostException("删除评论失败");
-        }
         Comment comment = commentMapper.selectById(id);
         if(comment.getId().equals(comment.getTopId())) {
+            LambdaQueryWrapper<Comment> queryWrapper = Wrappers.lambdaQuery(Comment.class)
+                    .eq(Comment::getTopId, id);
+            int delete = commentMapper.delete(queryWrapper);
+            if(delete <= 0) {
+                throw new PostException("删除根评论失败");
+            }
+            Post post = postMapper.selectById(comment.getPostId());
+            post.setCommentCount(post.getCommentCount() - delete);
+            postMapper.updateById(post);
+
             redisUtil.zRemove("post:comment_by_time:" + comment.getPostId(), comment.getId());
             redisUtil.zRemove("post:comment_by_hot:" + comment.getPostId(), comment.getId());
             redisUtil.delete("comment:reply_by_time:" + comment.getTopId());
             redisUtil.delete("comment:reply_by_hot:" + comment.getTopId());
         }else{
+            int delete = commentMapper.deleteById(id);
+            if(delete <= 0){
+                throw new PostException("删除评论失败");
+            }
+            Post post = postMapper.selectById(comment.getPostId());
+            post.setCommentCount(post.getCommentCount() - delete);
+            postMapper.updateById(post);
+
+            Comment parentComment = commentMapper.selectById(comment.getParentCommentId());
+            Comment topComment = commentMapper.selectById(comment.getTopId());
+            parentComment.setReplyCount(parentComment.getReplyCount() - delete);
+            topComment.setReplyCount(topComment.getReplyCount() - delete);
+            updateById(parentComment);
+            updateById(topComment);
+
             redisUtil.zRemove("comment:reply_by_time:" + comment.getTopId(), comment.getId());
             redisUtil.zRemove("comment:reply_by_hot:" + comment.getTopId(), comment.getId());
         }
+
         // TODO 如果根评论删除，那么其他评论怎么办，目前做法是删除其下所有的子评论
     }