优化代码

ruoyi-generator/src/main/resources/mapper/community/ArticleMapper.xml

@@ -111,7 +111,7 @@
         a.create_time as article_create_time,
         a.update_by as article_update_by,
         a.update_time as article_update_time,
-        a.address,
+        IFNULL(a.address, '未知') as address,
         a.is_comment,
         a.is_raffle,
         a.is_download,