I can't figure out how to write this simple expression. I am trying to compare 2 variable in a dtml-if statement.

---variables: username: <dtml-var username><br> AUTHENTICATED_USER: <dtml-var AUTHENTICATED_USER><br>

---output: username: dan AUTHENTICATED_USER: dan

---expression: <dtml-if "username == AUTHENTICATED_USER">

---evaluates false and I can't figure out why! Have also tried <dtml-if "username == REQUEST['AUTHENTICATED_USER']"> to no avail.

In the if expression you're using (username==ATHENTICATED_USER), you're comparing an object to a string. AUTHENTICATED_USER is a Zope object, not a string. You want: <dtml-if "username==AUTHENTICATED_USER.getUserName()">