/**
* Filter the query by a related \App\Propel\Promotion object
*
* @param \App\Propel\Promotion|ObjectCollection $promotion the related object to use as filter
* @param string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
*
* @return ChildResourceQuery The current query, for fluid interface
*/
public function filterByPromotion($promotion, $comparison = null)
{
if ($promotion instanceof \App\Propel\Promotion) {
return $this->addUsingAlias(ResourceTableMap::COL_RESOURCE_ID, $promotion->getResourceId(), $comparison);
} elseif ($promotion instanceof ObjectCollection) {
return $this->usePromotionQuery()->filterByPrimaryKeys($promotion->getPrimaryKeys())->endUse();
} else {
throw new PropelException('filterByPromotion() only accepts arguments of type \\App\\Propel\\Promotion or Collection');
}
}