Index: openacs-4/packages/dotlrn-ecommerce/www/ecommerce/shopping-cart-add.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/dotlrn-ecommerce/www/ecommerce/shopping-cart-add.tcl,v
diff -u -r1.8 -r1.9
--- openacs-4/packages/dotlrn-ecommerce/www/ecommerce/shopping-cart-add.tcl	25 Jul 2005 18:19:21 -0000	1.8
+++ openacs-4/packages/dotlrn-ecommerce/www/ecommerce/shopping-cart-add.tcl	27 Jul 2005 17:46:27 -0000	1.9
@@ -38,6 +38,11 @@
     {override_p 0}
 }
 
+# avoid anonymous participants
+if {$user_id == 0} {
+    set user_id [auth::require_login]
+}
+
 # Roel: Participant also pays
 if { $participant_id == 0 } {
     set participant_id $user_id