/**
* Retrieve multiple objects by pkey.
*
* @param array $pks List of primary keys
* @param PropelPDO $con the connection to use
* @throws PropelException Any exceptions caught during processing will be
* rethrown wrapped into a PropelException.
*/
public static function retrieveByPKs($pks, PropelPDO $con = null)
{
if ($con === null) {
$con = Propel::getConnection(CourseSectionPeer::DATABASE_NAME, Propel::CONNECTION_READ);
}
$objs = null;
if (empty($pks)) {
$objs = array();
} else {
$criteria = new Criteria(CourseSectionPeer::DATABASE_NAME);
$criteria->add(CourseSectionPeer::ID, $pks, Criteria::IN);
$objs = CourseSectionPeer::doSelect($criteria, $con);
}
return $objs;
}
/**
* Gets an array of CourseSection objects which contain a foreign key that references this object.
*
* If this collection has already been initialized with an identical Criteria, it returns the collection.
* Otherwise if this Course has previously been saved, it will retrieve
* related CourseSections from storage. If this Course is new, it will return
* an empty collection or the current collection, the criteria is ignored on a new object.
*
* @param PropelPDO $con
* @param Criteria $criteria
* @return array CourseSection[]
* @throws PropelException
*/
public function getCourseSections($criteria = null, PropelPDO $con = null)
{
if ($criteria === null) {
$criteria = new Criteria(CoursePeer::DATABASE_NAME);
} elseif ($criteria instanceof Criteria) {
$criteria = clone $criteria;
}
if ($this->collCourseSections === null) {
if ($this->isNew()) {
$this->collCourseSections = array();
} else {
$criteria->add(CourseSectionPeer::COURSE_ID, $this->id);
CourseSectionPeer::addSelectColumns($criteria);
$this->collCourseSections = CourseSectionPeer::doSelect($criteria, $con);
}
} else {
// criteria has no effect for a new object
if (!$this->isNew()) {
// the following code is to determine if a new query is
// called for. If the criteria is the same as the last
// one, just return the collection.
$criteria->add(CourseSectionPeer::COURSE_ID, $this->id);
CourseSectionPeer::addSelectColumns($criteria);
if (!isset($this->lastCourseSectionCriteria) || !$this->lastCourseSectionCriteria->equals($criteria)) {
$this->collCourseSections = CourseSectionPeer::doSelect($criteria, $con);
}
}
}
$this->lastCourseSectionCriteria = $criteria;
return $this->collCourseSections;
}
