Thanks, John. I amended the function accordingly and this was what I got.
function cpt_date_orderby( $query ) {
if (!$query->is_main_qieru()) {
return;
}
$orderby = $query->get( 'orderby' );
if( 'date' == $orderby ) {
$query->set('meta_key', 'date');
$query->set('orderby', 'meta_value_num');
}
}
add_action( 'pre_get_posts', 'cpt_date_orderby' );
Did I get it wrong?
