rails sitemap entries for pages without models

In building a sitemap for my rails app, I went off of this blog post:
 
http://tonycode.com/wiki/index.php?title=Ruby_on_Rails_Sitemap_Generator
 
but I have public-facing pages for which no ActiveRecord model exists.
 
I  added the following to my sitemap controller to add entries for a given
controller:

Then, for example, in my controller I just call:

@info_pages = get_public_action_urls(InformationPagesController)

 

and finally, in my view:

@info_pages.each do |entry|
  xml.url do
  xml.loc entry
  xml.lastmod w3c_date(Time.now)
  xml.changefreq "weekly"
  xml.priority 0.9
  end
end

oh, and in my sitemap_helper:

def w3c_date(date)
     date.utc.strftime("%Y-%m-%dT%H:%M:%S+00:00")
end