/** * 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'); } }