Vis kun varianter med GTIN nummer

<form action="" method="post">
    <input type="hidden" name="product_id" value="<{$product->getProductId()}>"/>
    <input type="hidden" name="redirect" value="<{$product->getMetaValue('redirect')|escape}>"/>

    <{section name="j" loop=$attr}>
        <{if $attr[j]->getIsVariant()}>
            <div class="line">
                <label for="a<{$attr[j]->getAttributeId()}>"><strong><{$attr[j]->getName()|escape}>:</strong></label>
                <{if $attr[j]->getDataType() == "valuelist"}>
                    <{assign var="values" value=$attr[j]->getValues()}>
                    <select name="attributes[<{$attr[j]->getAttributeId()}>]" id="a<{$attr[j]->getAttributeId()}>" class="attribute">
                        <{* <option value=""> - ingen -</option> *}>

                        <{section name="k" loop=$values}>
                            <{assign var="attribute_price" value=$product->getAttributePrice($values[k]->getAttributeValueId())}>
                                <{if $product->getGtin($values[k]->getAttributeValueId(),$attr[j]->getAttributeId())}>
                                    <option value="<{$values[k]->getAttributeValueId()}>">
                                        <{$values[k]->getVal()|escape}>
                                        <{if $attribute_price}>
                                            [<{$attribute_price|number_format:2:",":"."}> <{$webshop->getCurrency()}>]
                                        <{/if}>

                                        (<{$product->getInStock($attr[j]->getAttributeId(), $values[k]->getAttributeValueId())}> på lager)


                                    </option>
                                <{/if}>
                        <{/section}>
                    </select>
                <{/if}>
            </div>
        <{/if}>
    <{/section}>
    <input type="text" name="amount" value="1"/>
    <input type="submit" value="Læg i kurven" class="add_to_basket"/>
</form>