select_year

# File actionview/lib/action_view/helpers/date_helper.rb, line 840
      def select_year
        if !year || @datetime == 0
          val = "1"
          middle_year = Date.today.year
        else
          val = middle_year = year
        end

        if @options[:use_hidden] || @options[:discard_year]
          build_hidden(:year, val)
        else
          options         = {}
          options[:start] = @options[:start_year] || middle_year - 5
          options[:end]   = @options[:end_year] || middle_year + 5
          options[:step]  = options[:start] < options[:end] ? 1 : -1

          max_years_allowed = @options[:max_years_allowed] || 1000

          if (options[:end] - options[:start]).abs > max_years_allowed
            raise ArgumentError, "There are too many years options to be built. Are you sure you haven't mistyped something? You can provide the :max_years_allowed parameter."
          end

          build_select(:year, build_year_options(val, options))
        end
      end