# File lib/friendly_id/active_record2/tasks.rb, line 58
    def validate_uses_slugs
      unless friendly_id_config.use_slug?
        raise "Class '%s' doesn't use slugs" % klass.to_s
      end
    rescue NoMethodError
      raise "Class '%s' doesn't use FriendlyId" % klass.to_s
    end