diff --git a/ruoyi-system/src/main/resources/mapper/system/SysUserFollowMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysUserFollowMapper.xml
index 6fb9169..bea8888 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysUserFollowMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysUserFollowMapper.xml
@@ -28,4 +28,10 @@
         from sys_user_follow
         where user_id = #{userId} and author_id = #{authorId}
     </select>
+
+    <select id="selectUserIdByUsername" resultType="java.lang.Long">
+        select user_id
+        from sys_user
+        where user_name = #{username}
+    </select>
 </mapper>
\ No newline at end of file