Index: openacs-4/packages/acs-templating/www/doc/demo/list5/view-one.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-templating/www/doc/demo/list5/view-one.tcl,v
diff -u -r1.2.2.1 -r1.2.2.2
--- openacs-4/packages/acs-templating/www/doc/demo/list5/view-one.tcl	10 Sep 2015 08:22:14 -0000	1.2.2.1
+++ openacs-4/packages/acs-templating/www/doc/demo/list5/view-one.tcl	26 Jul 2016 10:32:38 -0000	1.2.2.2
@@ -7,8 +7,18 @@
     context:onevalue
     title:onevalue
     body:onevalue
+} -validate {
+    valid_note_id -requires template_demo_note_id {
+        if {![db_0or1row note_exists {
+            select 1 from template_demo_notes
+            where template_demo_note_id = :template_demo_note_id
+        }]} {
+            ad_complain "Invalid note ID"
+        }
+    }
 }
 
+
 set context [list "One note"]
 
 db_1row note_select {