function get_the_resume_ids( $post = null ) {
	$post = get_post( $post );
	if ( $post->post_type !== 'resume' )
		return '';

	if ( ! get_option( 'resume_manager_enable_categories' ) )
		return '';

	$categories = wp_get_object_terms( $post->ID, 'resume_category', array( 'fields' => 'ids' ) );

	if ( is_wp_error( $categories ) ) {
		return '';
	}

	return implode( ', ', $categories );
}