Cách sắp xếp sản phẩm trang web wordpress dựa trên hàng tồn kho

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?

Những gì tôi đã thử:

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');
	}
});