Product variants - 1.7

[Carpe_diem]

Hi guys,

I am trying to create a custom product list with a custom .tpl. I need help to display product variants. 
I add this

        <div class="product-actions">
                                {block name='product_buy'}
                                    <form action="{$urls.pages.cart}" method="post" id="add-to-cart-or-refresh">
                                        <input type="hidden" name="token" value="{$static_token}">
                                        <input type="hidden" name="id_product" value="{$product.id}" id="product_page_product_id">
                                        <input type="hidden" name="id_customization" value="{$product.id_customization}" id="product_customization_id">

                                        {block name='product_discounts'}
                                            {include file='catalog/_partials/product-discounts.tpl'}
                                        {/block}

                                        {block name='product_variants'}
                                            {include file='catalog/_partials/product-variants.tpl'}
                                        {/block}

                                        {block name='product_add_to_cart'}
                                            {include file='catalog/_partials/product-add-to-cart.tpl'}
                                        {/block}

                                    </form>
                                {/block}
                            </div>

but nothing is displayed except for quantity and add to cart.

Could someone please help me