Index: openacs-4/packages/attachments/www/attach.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/attachments/www/attach.tcl,v
diff -u -r1.12.2.1 -r1.12.2.2
--- openacs-4/packages/attachments/www/attach.tcl	10 Sep 2015 08:30:12 -0000	1.12.2.1
+++ openacs-4/packages/attachments/www/attach.tcl	1 Feb 2017 16:04:17 -0000	1.12.2.2
@@ -7,10 +7,10 @@
     @cvs-id $Id$
 
 } -query {
-    {object_id:notnull}
-    {folder_id ""}
+    {object_id:naturalnum,notnull,notnull}
+    {folder_id:integer ""}
     {pretty_object_name ""}
-    {return_url:notnull}
+    {return_url:localurl,notnull}
 }
 
 set user_id [ad_conn user_id]