Trying to show product variants in product list

[oby1sky]

I'm editing product-list.tpl file to show a box for each variant of all the articles instead just a box for each article.
When product-list.tpl query the DB, it asks for a list of all the articles in the DB:

{foreach from=$products item=product name=products}

How can i change it to query the Db for all the variants of all the articles?