/**
  * Filter the query by a related Factura object
  *
  * @param   Factura|PropelObjectCollection $factura The related object(s) to use as filter
  * @param     string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
  *
  * @return   FacturaDetalleQuery The current query, for fluid interface
  * @throws   PropelException - if the provided filter is invalid.
  */
 public function filterByFactura($factura, $comparison = null)
 {
     if ($factura instanceof Factura) {
         return $this->addUsingAlias(FacturaDetallePeer::FACTURA_ID, $factura->getId(), $comparison);
     } elseif ($factura instanceof PropelObjectCollection) {
         if (null === $comparison) {
             $comparison = Criteria::IN;
         }
         return $this->addUsingAlias(FacturaDetallePeer::FACTURA_ID, $factura->toKeyValue('PrimaryKey', 'Id'), $comparison);
     } else {
         throw new PropelException('filterByFactura() only accepts arguments of type Factura or PropelCollection');
     }
 }