/**
* Filter the query by a related \Issues object
*
* @param \Issues|ObjectCollection $issues the related object to use as filter
* @param string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
*
* @return ChildBooksQuery The current query, for fluid interface
*/
public function filterByIssues($issues, $comparison = null)
{
if ($issues instanceof \Issues) {
return $this->addUsingAlias(BooksTableMap::COL_ID, $issues->getForbook(), $comparison);
} elseif ($issues instanceof ObjectCollection) {
return $this->useIssuesQuery()->filterByPrimaryKeys($issues->getPrimaryKeys())->endUse();
} else {
throw new PropelException('filterByIssues() only accepts arguments of type \\Issues or Collection');
}
}
