/**
* This is a method for emulating ON DELETE CASCADE for DBs that don't support this
* feature (like MySQL or SQLite).
*
* This method is not very speedy because it must perform a query first to get
* the implicated records and then perform the deletes by calling those Peer classes.
*
* This method should be used within a transaction if possible.
*
* @param Criteria $criteria
* @param PropelPDO $con
* @return int The number of affected rows (if supported by underlying database driver).
*/
protected static function doOnDeleteCascade(Criteria $criteria, PropelPDO $con)
{
// initialize var to track total num of affected rows
$affectedRows = 0;
// first find the objects that are implicated by the $criteria
$objects = CoursePeer::doSelect($criteria, $con);
foreach ($objects as $obj) {
// delete related Section objects
$criteria = new Criteria(SectionPeer::DATABASE_NAME);
$criteria->add(SectionPeer::COURSE_ID, $obj->getId());
$affectedRows += SectionPeer::doDelete($criteria, $con);
}
return $affectedRows;
}
