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