# File lib/audited/auditor.rb, line 397
      def calculate_non_audited_columns
        if audited_options[:only].present?
          (column_names | default_ignored_attributes) - audited_options[:only]
        elsif audited_options[:except].present?
          default_ignored_attributes | audited_options[:except]
        else
          default_ignored_attributes
        end
      end