修改bug

joying-common/src/main/resources/mapper/NftMapper.xml

@@ -6,9 +6,9 @@
         select * from tb_nft
         where status = 1
         <if test="categoryId != null and categoryId > 0">
-            category_id=#{categoryId}
+            and category_id=#{categoryId}
         </if>
-        order by is_top , update_date desc
+        order by is_top desc , update_date desc
         limit #{pageNum},#{pageSize}
     </select>