re: https://github.com/plataformatec/simple_form/issues/462

gistfile1.txt

<form accept-charset="UTF-8" action="/pieces" class="simple_form form-horizontal" id="new_piece" method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="✓"><input name="authenticity_token" type="hidden"></div>  <div class="input text optional piece_title"><label class="text optional" for="piece_title">Title</label><textarea class="text optional" id="piece_title" name="piece[title]"></textarea></div>
          <div class="input string optional piece_cover_image field_with_hint"><label class="string optional" for="piece_cover_image">Cover image</label><input class="string optional" id="piece_cover_image" maxlength="255" name="piece[cover_image]" size="255" type="text"><span class="hint">url for image</span></div>
          <div class="input integer optional piece_order"><label class="integer optional" for="piece_order">Order</label><input class="numeric integer optional" id="piece_order" name="piece[order]" step="1" type="number"></div>
          <div class="input string optional piece_start_date field_with_hint"><label class="string optional" for="piece_start_date">Start date</label><input class="string optional" id="piece_start_date" maxlength="255" name="piece[start_date]" size="255" type="text"><span class="hint">a string describing when the project got started</span></div>
          <div class="input string optional piece_end_date field_with_hint"><label class="string optional" for="piece_end_date">End date</label><input class="string optional" id="piece_end_date" maxlength="255" name="piece[end_date]" size="255" type="text"><span class="hint">optional</span></div>
          <textarea hint="in markdown" id="piece_description" label="Description" name="piece[description]"></textarea>

          <input class="button" name="commit" type="submit" value="Create Piece">
        </form>

gistfile2.txt

= simple_form_for @piece, :html => { :class => 'form-horizontal' } do |f|
  =f.input :title
  =f.input :cover_image, hint: 'url for image'
  =f.input :order
  =f.input :start_date, hint: 'a string describing when the project got started'
  =f.input :end_date, hint: 'optional'
  =f.text_area :description, hint: 'in markdown', label: 'Description'
  =f.button :submit