/**
* 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 $con an optional connection object
*
* @return CourseModule|array|mixed the result, formatted by the current formatter
*/
public function findPk($key, $con = null)
{
if (null !== ($obj = CourseModulePeer::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 $con the connection to use
* @return CourseModule
*/
public static function retrieveByPK($pk, PropelPDO $con = null)
{
if (null !== ($obj = CourseModulePeer::getInstanceFromPool((string) $pk))) {
return $obj;
}
if ($con === null) {
$con = Propel::getConnection(CourseModulePeer::DATABASE_NAME, Propel::CONNECTION_READ);
}
$criteria = new Criteria(CourseModulePeer::DATABASE_NAME);
$criteria->add(CourseModulePeer::ID, $pk);
$v = CourseModulePeer::doSelect($criteria, $con);
return !empty($v) > 0 ? $v[0] : null;
}