Simple Form Datepicker Input

datepicker_input.rb

class DatepickerInput < SimpleForm::Inputs::Base
  def input(wrapper_options)
    merged_input_options = merge_wrapper_options(input_html_options, wrapper_options)
    @builder.text_field(attribute_name, merged_input_options) + \
    @builder.hidden_field(attribute_name, { :class => attribute_name.to_s + "-alt"})
  end
end

This is a follow-up update to the answer on https://stackoverflow.com/questions/24599266/rails-4-simple-form-and-jquery-ui-datepicker-is-not-working-via-turbolinks