Tax Archives – Pre Get Posts

/**
 * Add our post types to the query.
 *
 * @since 1.0.0
 *
 * @param object $query WP_Query instance.
 */
function pluginize_amend_term_archive( $query ) {

    if ( is_admin() || ! $query->is_main_query() ) {
        return;
    }

    if ( ! $query->is_category() ) {
        return;
    }

    $query->set(
        'post_type',
        array_merge(
            array( 'post' ),
            cptui_get_post_type_slugs()
        )
    );

}
add_action( 'pre_get_posts', 'pluginize_amend_term_archive' );