public function get_payments()
{
$payment_ids = SI_Payment::get_payments(array('invoices' => $this->ID));
return $payment_ids;
}
/**
* If an invoice was deleted also delete the payments associated
* @param integer $post_id
* @return null
*/
public static function maybe_delete_payment($post_id = 0)
{
if (get_post_type($post_id) == SI_Invoice::POST_TYPE) {
$payment_ids = SI_Payment::get_payments(array('invoices' => $post_id));
foreach ($payment_ids as $payment_id) {
wp_delete_post($payment_id);
}
}
}
