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