/**
* Add a sfPollUserAnswer object related to current sfPoll object instance
*
* @param int $user_id Typically an integer representing a User PK
* @param int $answer_id sfPollAnswer PK
* @param string $ip_address IP address (optionnal)
* @return sfPollUserAnswer
* @throws PropelException
**/
public function addUserAnswer($user_id, $answer_id, $ip_address = NULL)
{
if ($this->isNew() or is_null($this->getId())) {
throw new PropelException('You cannot add a user answer to an unsaved poll');
}
$answer = sfPollAnswerPeer::retrieveByPK($answer_id);
if (!$answer) {
throw new PropelException('Unable to retrieve answer associated to poll');
}
if ($answer->getPollId() !== $this->getId()) {
throw new PropelException('The answer provided is not associated with current poll');
}
# Checks if user has already voted
$user_answer = sfPollUserAnswerPeer::getOrCreate($this->getId(), $user_id, $ip_address);
$user_answer->setPollId($this->getId());
$user_answer->setAnswerId($answer_id);
$user_answer->setUserId($user_id);
$user_answer->setIpAddress($ip_address);
$user_answer->save();
return $user_answer;
}
