كيفية فرز منتجات موقع ووردبريس على أساس المخزون

hi
I have a WooCommerce store website. I use this code to sort products based on inventory. But the code has an error. It dosent work corretct.please guide me. How to sort WordPress site products based on inventory?

ما حاولت:

add_action('init', function() {
	if( isset($_GET['update_products_arv']) ) {
		$products = wc_get_products( [ 'limit' => 500,'offset' => 200] );
		foreach( $products as $product ){
			$total_stock = $product->get_stock_quantity() ? : 0;
			if( $product->is_type( 'variable' ) ){
				$variations = $product->get_children();
				if( !$variations ) continue;
				foreach ($variations as $variation_id) {
					$variation = wc_get_product( $variation_id );
					$total_stock += $variation->get_stock_quantity() ? : 0;
				}
			}
			update_post_meta($product->get_id(), 'xx_stock', $total_stock);
		}
	}
});

add_action('woocommerce_product_query', function($q) {
	if( ! is_admin() ) {
		$q->set('orderby', 'meta_value_num');
		$q->set('meta_key', 'xx_stock');
		$q->set('order', 'DESC');
	}
});