anchor.diff:            <select>
               <% @product.variants.each_with_index do |v, index| %>
                 <% v.variant_property_values.each do |vpv| %>
  -                <option value=<%= v.id %> ><%= index%> - <%vpv.variant_property.display_name%> - <%= vpv.presentation%></option>
  +                <option id=<%= v.id %> value=<%= v.id %> ><%= index%> - <%vpv.variant_property.display_name%> - <%= vpv.presentation%></option>
                 <% end %>
               <% end %>
             </select>
  
positive.code:             <dt>Descrição<dt>
              <dd><%= @variant.description %></dd>
            <% end %>
          </dl>
  
          
        <!--Tem de se por o master variante e os variantes tb-->
          <% if !@product.variants.empty? %>
            <dl>
              <dt>Variantes:</dt>
  
negative.code: 
  <script>
  $(document).ready(function() {
    var indexId = $('#product-show select #<%= @variant.id %>').index()
  
    $('#product-show select').prop('selectedIndex', indexId);
    //$('#product-show select').prop('selectedIndex', );
  
    $('#product-show select').change(function(){
      var id = $(this).val();
  