You should read this answer fooobar.com/questions/1545836 / ... first .
, User Model, expire_at_next_request?
before_filter , .
class ApplicationController < ActionController::Base
before_filter :logout_if_requested
def logout_if_requested
if current_user && current_user.expire_at_next_request?
current_user.update_attributes(:expire_at_next_request=>false)
sign_out current_user
redirect_to :new_session_path
end
end