Is there a way to sort WooCommerce products by their custom attribute?
I can add options into sort order dropdown by calling
add_filter( "woocommerce_catalog_orderby", "custom_woocommerce_catalog_orderby", 20 );
But is there a way to add new sort options for custom product attributes? I tried to add options like 'pa_shirt-size' => __( 'Sort by shirt size: small to large', 'woocommerce' ), but that doesn't seems to work. The selection does nothing.
