type_cast_for_database

# File activerecord/lib/active_record/type/string.rb, line 14
      def type_cast_for_database(value)
        case value
        when ::Numeric, ActiveSupport::Duration then value.to_s
        when ::String then ::String.new(value)
        when true then "t"
        when false then "f"
        else super
        end
      end