[Zope] Zsql / Zcatalog

Hello, I am having some difficulty passing a value from a python script into a url from a zsql method to a zcatalog. I am following this example: http://zope.org/Members/rbickers/cataloganything The issue that I am having is that the value of pub_id will not display in the url. The id is being passed into the catalog, just not displayed in the url. Any suggestions? Thanks, Chris for publication in container.view_publications_sql(): publication.catalog_object(publication, '/publications/cat_pub_detail/+publication.pub_id+/publication_html') print publication # print publication.pub_id return printed