/**
* Filter the query by a related Solicitud object
*
* @param Solicitud $solicitud the related object to use as filter
* @param string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
*
* @return LibroQuery The current query, for fluid interface
*/
public function filterBySolicitud($solicitud, $comparison = null)
{
if ($solicitud instanceof Solicitud) {
return $this->addUsingAlias(LibroPeer::ID, $solicitud->getId_libro(), $comparison);
} elseif ($solicitud instanceof PropelCollection) {
return $this->useSolicitudQuery()->filterByPrimaryKeys($solicitud->getPrimaryKeys())->endUse();
} else {
throw new PropelException('filterBySolicitud() only accepts arguments of type Solicitud or PropelCollection');
}
}