included_in_action?

# File actionpack/lib/action_controller/filters.rb, line 367
        def included_in_action?(controller, options)
          if options[:only]
            Array(options[:only]).map(&:to_s).include?(controller.action_name)
          elsif options[:except]
            !Array(options[:except]).map(&:to_s).include?(controller.action_name)
          else
            true
          end
        end