WP_Query with custom post type ID
I fixed it by doing it a different way $query = new WP_Query(array( ‘post_type’ => ‘tracks’, ‘posts_per_page’ => -1, ‘orderby’ => ‘meta_value_num’, ‘meta_key’ => ‘track_number’, ‘meta_query’ => array( array( ‘meta_key’ => ‘mixtape’, ‘meta_value’ => (string)$mixtape_id ) ) ));