Assuming the rest works, why not order the normal way:
function sort_posts_orderby( $orderby ) {
$orderby = 'wp_postmeta.meta_value ASC, wp_posts.post_date DESC';
return $orderby;
}
Assuming the rest works, why not order the normal way:
function sort_posts_orderby( $orderby ) {
$orderby = 'wp_postmeta.meta_value ASC, wp_posts.post_date DESC';
return $orderby;
}