/**
* Filter the query by a related \Categories object
*
* @param \Categories|ObjectCollection $categories The related object(s) to use as filter
* @param string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
*
* @throws \Propel\Runtime\Exception\PropelException
*
* @return ChildItemsQuery The current query, for fluid interface
*/
public function filterByCategories($categories, $comparison = null)
{
if ($categories instanceof \Categories) {
return $this->addUsingAlias(ItemsTableMap::COL_CATEGORY_ID, $categories->getCategoryId(), $comparison);
} elseif ($categories instanceof ObjectCollection) {
if (null === $comparison) {
$comparison = Criteria::IN;
}
return $this->addUsingAlias(ItemsTableMap::COL_CATEGORY_ID, $categories->toKeyValue('PrimaryKey', 'CategoryId'), $comparison);
} else {
throw new PropelException('filterByCategories() only accepts arguments of type \\Categories or Collection');
}
}
