WooCommerce Sort by sales - add an option to your WooCommerce store for sorting products by sales

functions.php

<?php
// Place the code below in your theme's functions.php file
add_filter( 'woocommerce_get_catalog_ordering_args', 'wc_get_catalog_ordering_args' );
function wc_get_catalog_ordering_args( $args ) {
  $orderby_value = isset( $_GET['orderby'] ) ? woocommerce_clean( $_GET['orderby'] ) : apply_filters( 'woocommerce_default_catalog_orderby', get_option( 'woocommerce_default_catalog_orderby' ) );
	if ( 'sales' == $orderby_value ) {
		$args['orderby'] = 'meta_value_num';
		$args['order'] = 'DESC';
		$args['meta_key'] = 'total_sales';
	}
	return $args;
}
 
add_filter( 'woocommerce_default_catalog_orderby_options', 'wc_catalog_orderby' );
add_filter( 'woocommerce_catalog_orderby', 'wc_catalog_orderby' );
function wc_catalog_orderby( $sortby ) {
	$sortby['sales'] = 'Sales';
	return $sortby;
}
?>

This code displays out of stock products also

The code doesn't seem to be working.

Yep, it doesnt work. :( WC 2.1.9 + WP 3.9.1.

Scratch that it does work. :) It's just for the front end, not the back end.

Works, but not for products with variants

This does not work... products who are on sale are not at the top of a product catalog page. Please help...