/**
* gets the previous change if the action is 'modified'
*
* @return ConceptPropertyHistory object
*/
function getPrevious()
{
$propertyId = $this->getConceptPropertyId();
$timestamp = $this->getCreatedAt();
//build the query string
$c = new Criteria();
$crit0 = $c->getNewCriterion(ConceptPropertyHistoryPeer::CONCEPT_PROPERTY_ID, $propertyId);
$crit1 = $c->getNewCriterion(ConceptPropertyHistoryPeer::CREATED_AT, $timestamp, Criteria::LESS_THAN);
// Perform AND at level 0 ($crit0 $crit1 )
$crit0->addAnd($crit1);
$c->add($crit0);
//set order and limits
$c->setLimit(1);
$c->addDescendingOrderByColumn(ConceptPropertyHistoryPeer::CREATED_AT);
$result = ConceptPropertyHistoryPeer::doSelect($c);
//return the resulting object
if (count($result)) {
$result = $result[0];
}
return $result;
}
/**
* If this collection has already been initialized with
* an identical criteria, it returns the collection.
* Otherwise if this SkosProperty has previously
* been saved, it will retrieve related ConceptPropertyHistorys from storage.
* If this SkosProperty is new, it will return
* an empty collection or the current collection, the criteria
* is ignored on a new object.
*
* @param Connection $con
* @param Criteria $criteria
* @throws PropelException
*/
public function getConceptPropertyHistorys($criteria = null, $con = null)
{
// include the Peer class
include_once 'lib/model/om/BaseConceptPropertyHistoryPeer.php';
if ($criteria === null) {
$criteria = new Criteria();
} elseif ($criteria instanceof Criteria) {
$criteria = clone $criteria;
}
if ($this->collConceptPropertyHistorys === null) {
if ($this->isNew()) {
$this->collConceptPropertyHistorys = array();
} else {
$criteria->add(ConceptPropertyHistoryPeer::SKOS_PROPERTY_ID, $this->getId());
ConceptPropertyHistoryPeer::addSelectColumns($criteria);
$this->collConceptPropertyHistorys = ConceptPropertyHistoryPeer::doSelect($criteria, $con);
}
} else {
// criteria has no effect for a new object
if (!$this->isNew()) {
// the following code is to determine if a new query is
// called for. If the criteria is the same as the last
// one, just return the collection.
$criteria->add(ConceptPropertyHistoryPeer::SKOS_PROPERTY_ID, $this->getId());
ConceptPropertyHistoryPeer::addSelectColumns($criteria);
if (!isset($this->lastConceptPropertyHistoryCriteria) || !$this->lastConceptPropertyHistoryCriteria->equals($criteria)) {
$this->collConceptPropertyHistorys = ConceptPropertyHistoryPeer::doSelect($criteria, $con);
}
}
}
$this->lastConceptPropertyHistoryCriteria = $criteria;
return $this->collConceptPropertyHistorys;
}
/**
* Retrieve multiple objects by pkey.
*
* @param array $pks List of primary keys
* @param Connection $con the connection to use
* @throws PropelException Any exceptions caught during processing will be
* rethrown wrapped into a PropelException.
*/
public static function retrieveByPKs($pks, $con = null)
{
if ($con === null) {
$con = Propel::getConnection(self::DATABASE_NAME);
}
$objs = null;
if (empty($pks)) {
$objs = array();
} else {
$criteria = new Criteria();
$criteria->add(ConceptPropertyHistoryPeer::ID, $pks, Criteria::IN);
$objs = ConceptPropertyHistoryPeer::doSelect($criteria, $con);
}
return $objs;
}
/**
* returns the last property history older than the supplied timestamp
*
* @return ConceptPropertyHistory
* @param date $ts (optional) If null returns the latest
*/
public function getLastHistoryByTimestamp($ts = null)
{
$c = new Criteria();
$c->add(ConceptPropertyHistoryPeer::CONCEPT_PROPERTY_ID, $this->getId());
if ($ts) {
$c->add(ConceptPropertyHistoryPeer::CREATED_AT, $ts, Criteria::LESS_EQUAL);
}
$c->addDescendingOrderByColumn(ConceptPropertyHistoryPeer::CREATED_AT);
$c->setLimit(1);
$result = ConceptPropertyHistoryPeer::doSelect($c);
$result = count($result) == 1 ? $result[0] : false;
return $result;
}