class Stringex::ActsAsUrl::Adapter::Base

def url_attribute(instance)
  # Retrieve from database record if there are errors on attribute_to_urlify
  if !is_new?(instance) && is_present?(instance.errors[settings.attribute_to_urlify])
    self.instance = instance
    read_attribute instance_from_db, settings.url_attribute
  else
    read_attribute instance, settings.url_attribute
  end
end