input_name_from_type

# File actionview/lib/action_view/helpers/date_helper.rb, line 1114
        def input_name_from_type(type)
          prefix = @options[:prefix] || ActionView::Helpers::DateTimeSelector::DEFAULT_PREFIX
          prefix += "[#{@options[:index]}]" if @options.has_key?(:index)

          field_name = @options[:field_name] || type.to_s
          if @options[:include_position]
            field_name += "(#{ActionView::Helpers::DateTimeSelector::POSITION[type]}i)"
          end

          @options[:discard_type] ? prefix : "#{prefix}[#{field_name}]"
        end