/**
* Removes this object from datastore and sets delete attribute.
*
* @param PropelPDO $con
* @return void
* @throws PropelException
* @see BaseObject::setDeleted()
* @see BaseObject::isDeleted()
*/
public function delete(PropelPDO $con = null)
{
foreach (sfMixer::getCallables('BaseCourseComment:delete:pre') as $callable) {
$ret = call_user_func($callable, $this, $con);
if ($ret) {
return;
}
}
if ($this->isDeleted()) {
throw new PropelException("This object has already been deleted.");
}
if ($con === null) {
$con = Propel::getConnection(CourseCommentPeer::DATABASE_NAME, Propel::CONNECTION_WRITE);
}
$con->beginTransaction();
try {
CourseCommentPeer::doDelete($this, $con);
$this->setDeleted(true);
$con->commit();
} catch (PropelException $e) {
$con->rollBack();
throw $e;
}
foreach (sfMixer::getCallables('BaseCourseComment:delete:post') as $callable) {
call_user_func($callable, $this, $con);
}
}
/**
* 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 CourseComment objects
$c = new Criteria(CourseCommentPeer::DATABASE_NAME);
$c->add(CourseCommentPeer::COURSE_ID, $obj->getId());
$affectedRows += CourseCommentPeer::doDelete($c, $con);
// delete related CourseDetail objects
$c = new Criteria(CourseDetailPeer::DATABASE_NAME);
$c->add(CourseDetailPeer::COURSE_ID, $obj->getId());
$affectedRows += CourseDetailPeer::doDelete($c, $con);
// delete related Exam objects
$c = new Criteria(ExamPeer::DATABASE_NAME);
$c->add(ExamPeer::COURSE_ID, $obj->getId());
$affectedRows += ExamPeer::doDelete($c, $con);
}
return $affectedRows;
}