Rails - Aug 2007 - uninitialized constant ActionWebService::Dispatcher::ActionController::Base

i''m looking at the peepcode video on caching with rails. later on in
the video he shows a little hack so that the there will be a cached
index.html file when you have a default route for the controller that
you want cached.

he does it by adding an after filter for the index page:
after_filter :cache_index, :only => [:index] and then adding that
method in the controller:

  protected

  def cache_index
    if(ActionController::Base.perform_caching)
      FileUtils.cp File.join(RAILS_ROOT, ''public'',
''tallies.html''),
                   File.join(RAILS_ROOT, ''public'',
''index.html'')
    end
  end

when using this though, i get the following error:
  uninitialized constant
ActionWebService::Dispatcher::ActionController::Base

can anyone tell me why it''s doing this?
thanks


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