/**
* Retrieve object using using composite pkey values.
* @param int $subscriber_id
* @param int $subscriber_group_id
* @param PropelPDO $con
* @return SubscriberGroupMembership
*/
public static function retrieveByPK($subscriber_id, $subscriber_group_id, PropelPDO $con = null)
{
$_instancePoolKey = serialize(array((string) $subscriber_id, (string) $subscriber_group_id));
if (null !== ($obj = SubscriberGroupMembershipPeer::getInstanceFromPool($_instancePoolKey))) {
return $obj;
}
if ($con === null) {
$con = Propel::getConnection(SubscriberGroupMembershipPeer::DATABASE_NAME, Propel::CONNECTION_READ);
}
$criteria = new Criteria(SubscriberGroupMembershipPeer::DATABASE_NAME);
$criteria->add(SubscriberGroupMembershipPeer::SUBSCRIBER_ID, $subscriber_id);
$criteria->add(SubscriberGroupMembershipPeer::SUBSCRIBER_GROUP_ID, $subscriber_group_id);
$v = SubscriberGroupMembershipPeer::doSelect($criteria, $con);
return !empty($v) ? $v[0] : null;
}
