To extend sessions in my class I must do this in rails:

Code:
class ApplicationController < ActionController::Base
	model :user
	before_filter :verify_user

	def verify_user
::ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS.update(:session_expires => 1.hour.from_now)

		...
	end
end
I am new to Ruby Also. Why must I use the :: operator to access ActionController? And doesnt rails have an instance of CgiRequest with @request? Why Cant I use that?