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