/**
* Filter the query by a related ItemSubType object
*
* @param ItemSubType|PropelObjectCollection $itemSubType the related object to use as filter
* @param string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
*
* @return ItemTypeQuery The current query, for fluid interface
* @throws PropelException - if the provided filter is invalid.
*/
public function filterBySubType($itemSubType, $comparison = null)
{
if ($itemSubType instanceof ItemSubType) {
return $this->addUsingAlias(ItemTypePeer::ID, $itemSubType->getMainTypeId(), $comparison);
} elseif ($itemSubType instanceof PropelObjectCollection) {
return $this->useSubTypeQuery()->filterByPrimaryKeys($itemSubType->getPrimaryKeys())->endUse();
} else {
throw new PropelException('filterBySubType() only accepts arguments of type ItemSubType or PropelCollection');
}
}
