Automatically populate sales product category in WooCommerce

[sebastian-moran]

Automatically populate sales product category in WooCommerce on child sites.

Snippet Type

Execute on Child Sites

Snippet

add_action( 'woocommerce_product_query', 'wc_sale_category' );
 
function wc_sale_category( $q ) {
   if ( "sale" !== $q->get( 'product_cat' ) ) return; // "sale" = slug
   $q->set( 'post_type', 'product' );
   $q->set( 'product_cat', null );
   $product_ids_on_sale = wc_get_product_ids_on_sale() ? wc_get_product_ids_on_sale() : array();
   $q->set( 'post__in', $product_ids_on_sale );
}