Discuz! Database Error

(1064) You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'and isimage='1' and remote='0'' at line 1
select attachment,filename from portal_attachment where aid= and isimage='1' and remote='0'

PHP Debug

No.FileLineCode
1portal.php32require_once(%s)
2source/module/portal/portal_view.php23showmessage()
3source/function/function_core.php1420dshowmessage()
4source/function/function_message.php237include(%s)
5data/template/3_3_common_showmessage.tpl.php1hookscriptoutput()
6source/function/function_core.php1212hookscript()
7source/function/function_core.php1171plugin_god_imgalt_portal->view_article_content_output()
8source/plugin/god_imgalt/hook.class.php57discuz_database::fetch_all()
9source/class/discuz/discuz_database.php103discuz_database::query()
10source/class/discuz/discuz_database.php139db_driver_mysqli->query()
11source/class/db/db_driver_mysqli.php147db_driver_mysqli->halt()
12source/class/db/db_driver_mysqli.php222break()
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