/**
* Filter the query by a related Principal object
*
* @param Principal|PropelObjectCollection $principal The related object(s) to use as filter
* @param string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
*
* @return PrincipalI18nQuery The current query, for fluid interface
* @throws PropelException - if the provided filter is invalid.
*/
public function filterByPrincipal($principal, $comparison = null)
{
if ($principal instanceof Principal) {
return $this->addUsingAlias(PrincipalI18nPeer::ID, $principal->getId(), $comparison);
} elseif ($principal instanceof PropelObjectCollection) {
if (null === $comparison) {
$comparison = Criteria::IN;
}
return $this->addUsingAlias(PrincipalI18nPeer::ID, $principal->toKeyValue('PrimaryKey', 'Id'), $comparison);
} else {
throw new PropelException('filterByPrincipal() only accepts arguments of type Principal or PropelCollection');
}
}