/**
  * Find object by primary key
  * Use instance pooling to avoid a database query if the object exists
  * <code>
  * $obj  = $c->findPk(12, $con);
  * </code>
  * @param     mixed $key Primary key to use for the query
  * @param     PropelPDO $con an optional connection object
  *
  * @return    ChatConnected|array|mixed the result, formatted by the current formatter
  */
 public function findPk($key, $con = null)
 {
     if (null !== ($obj = ChatConnectedPeer::getInstanceFromPool((string) $key)) && $this->getFormatter()->isObjectFormatter()) {
         // the object is alredy in the instance pool
         return $obj;
     } else {
         // the object has not been requested yet, or the formatter is not an object formatter
         $criteria = $this->isKeepQuery() ? clone $this : $this;
         $stmt = $criteria->filterByPrimaryKey($key)->getSelectStatement($con);
         return $criteria->getFormatter()->init($criteria)->formatOne($stmt);
     }
 }
 /**
  * Retrieve a single object by pkey.
  *
  * @param      int $pk the primary key.
  * @param      PropelPDO $con the connection to use
  * @return     ChatConnected
  */
 public static function retrieveByPK($pk, PropelPDO $con = null)
 {
     if (null !== ($obj = ChatConnectedPeer::getInstanceFromPool((string) $pk))) {
         return $obj;
     }
     if ($con === null) {
         $con = Propel::getConnection(ChatConnectedPeer::DATABASE_NAME, Propel::CONNECTION_READ);
     }
     $criteria = new Criteria(ChatConnectedPeer::DATABASE_NAME);
     $criteria->add(ChatConnectedPeer::USER_ID, $pk);
     $v = ChatConnectedPeer::doSelect($criteria, $con);
     return !empty($v) > 0 ? $v[0] : null;
 }