[Zope] What's up with the format commands?

[John Morton]

I'm trying to use fmt=url_quote to munge the value of a property into
something that I can put into an url (obviously :-), yet zope is giving me
grief:

This...

<dtml-var standard_html_header>

<dtml-let foo="absolute_url">
  <dtml-var foo fmt=url_quote>
</dtml-let>

<dtml-var standard_html_footer>

Gives me this error...


Error Type: TypeError
Error Value: not all arguments converted

[snip]
  File /usr/lib/zope/lib/python/DocumentTemplate/DT_Let.py, line 145, in render
    (Object: foo="absolute_url")
  File /usr/lib/zope/lib/python/DocumentTemplate/DT_Var.py, line 313, in render
    (Object: foo)
    (Info: ('foo', 'http://antares/pcgi/kaos/memepool', {'fmt': 'url_quote', '': 'foo'}))
TypeError: (see above)

John.