/**
* Get the answer provided by an user from its PK or IP address
*
* @param int $user_id
* @param string $ip_address (optional)
* @return sfPollUserAnswer or NULL
**/
public function getUserAnswer($user_id, $ip_address = NULL)
{
$c = new Criteria();
if ($ip_address) {
$c->add(sfPollUserAnswerPeer::IP_ADDRESS, $ip_address);
} else {
$c->add(sfPollUserAnswerPeer::USER_ID, $user_id);
}
$c->add(sfPollUserAnswerPeer::POLL_ID, $this->getId());
return sfPollUserAnswerPeer::doSelectOne($c);
}
