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