Rails - Sep 2005 - observing destroy

I have the following:

  cache_sweeper :shows_sweeper, :only => [ :destroy, :update, :publish ]

  def destroy
    Show.find( @params[ :id ] ).destroy
    redirect_to :action => ''list''
  end

in my controller.

in the shows_sweeper I have:

class ShowsSweeper < ActiveRecord::Observer
  observe Venue, Show

  def after_save( record )
    @shows = record.is_a?( Show ) ? [ record ] : record.shows
  end

  def filter( controller )
    @shows.each { |show| controller.expire_page( :controller => 
''/shows'', :action => %w( view ), :id => show.id ) }
  end
end


but for destroy i get that @shows is nil and i''m not sure where
i''m
supposed to step in to set it.
which callback does ShowsSweeper need to have to deal with
''destroy''.

Thanks for the help.






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