Rudimentary page caching.

gistfile1.rb

::PagesController.module_eval do
  caches_page :show, :unless => proc {|c| c.user_signed_in? || c.flash.any? }
  caches_page :home, :unless => proc {|c| c.user_signed_in? || c.flash.any? }
end
::Page.module_eval do
  after_save :clear_static_caching!
  after_destroy :clear_static_caching!

  def clear_static_caching!
    Page.all.map(&:url).map{|u|
      [(u if u.is_a?(String)), (u[:path] if u.respond_to?(:keys))].compact
    }.flatten.map{ |u| [(u.split('/').last || 'index'), 'html'].join('.')}.each do |page|
      if (static_file = Rails.root.join('public', page)).file?
        $stdout.puts "Clearing cached page #{static_file.split.last}"
        static_file.delete
      end
    end
  end
  protected :clear_static_caching!
end

caches_page :show, :if => proc {|c| c.request.query_parameters.length == 0}