module Devise::Models::Trackable

def update_tracked_fields(request)
  old_current, new_current = self.current_sign_in_at, Time.now.utc
  self.last_sign_in_at     = old_current || new_current
  self.current_sign_in_at  = new_current
  old_current, new_current = self.current_sign_in_ip, extract_ip_from(request)
  self.last_sign_in_ip     = old_current || new_current
  self.current_sign_in_ip  = new_current
  self.sign_in_count ||= 0
  self.sign_in_count += 1
end