/**
  * Adds an object to the instance pool.
  *
  * Propel keeps cached copies of objects in an instance pool when they are retrieved
  * from the database.  In some cases -- especially when you override doSelect*()
  * methods in your stub classes -- you may need to explicitly add objects
  * to the cache in order to ensure that the same objects are always returned by doSelect*()
  * and retrieveByPK*() calls.
  *
  * @param SubscriberGroupMembership $obj A SubscriberGroupMembership object.
  * @param      string $key (optional) key to use for instance map (for performance boost if key was already calculated externally).
  */
 public static function addInstanceToPool($obj, $key = null)
 {
     if (Propel::isInstancePoolingEnabled()) {
         if ($key === null) {
             $key = serialize(array((string) $obj->getSubscriberId(), (string) $obj->getSubscriberGroupId()));
         }
         // if key === null
         SubscriberGroupMembershipPeer::$instances[$key] = $obj;
     }
 }
 /**
  * Filter the query by a related SubscriberGroupMembership object
  *
  * @param   SubscriberGroupMembership|PropelObjectCollection $subscriberGroupMembership  the related object to use as filter
  * @param     string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
  *
  * @return                 SubscriberQuery The current query, for fluid interface
  * @throws PropelException - if the provided filter is invalid.
  */
 public function filterBySubscriberGroupMembership($subscriberGroupMembership, $comparison = null)
 {
     if ($subscriberGroupMembership instanceof SubscriberGroupMembership) {
         return $this->addUsingAlias(SubscriberPeer::ID, $subscriberGroupMembership->getSubscriberId(), $comparison);
     } elseif ($subscriberGroupMembership instanceof PropelObjectCollection) {
         return $this->useSubscriberGroupMembershipQuery()->filterByPrimaryKeys($subscriberGroupMembership->getPrimaryKeys())->endUse();
     } else {
         throw new PropelException('filterBySubscriberGroupMembership() only accepts arguments of type SubscriberGroupMembership or PropelCollection');
     }
 }
 /**
  * Exclude object from result
  *
  * @param   SubscriberGroupMembership $subscriberGroupMembership Object to remove from the list of results
  *
  * @return SubscriberGroupMembershipQuery The current query, for fluid interface
  */
 public function prune($subscriberGroupMembership = null)
 {
     if ($subscriberGroupMembership) {
         $this->addCond('pruneCond0', $this->getAliasedColName(SubscriberGroupMembershipPeer::SUBSCRIBER_ID), $subscriberGroupMembership->getSubscriberId(), Criteria::NOT_EQUAL);
         $this->addCond('pruneCond1', $this->getAliasedColName(SubscriberGroupMembershipPeer::SUBSCRIBER_GROUP_ID), $subscriberGroupMembership->getSubscriberGroupId(), Criteria::NOT_EQUAL);
         $this->combine(array('pruneCond0', 'pruneCond1'), Criteria::LOGICAL_OR);
     }
     return $this;
 }