<%= content_tag :h3, "#{product.name} - #{euro(product.price)}" %> <%= f.counter :count, skip_label: true, wrapper_class: "input-group", class: "row_counter" %> <%= f.fields_for :product do |product| %> <%= product.hidden_field :price_cents, class: :price %> <%= product.hidden_field :stock, class: :stock %> <% end %>