/**
* Return the amount of objects that satisfy a given criteria
* @param $criteria An TCriteria object, specifiyng the filters
* @return An Integer containing the amount of objects that satisfy the criteria
*/
public function count(TCriteria $criteria = NULL)
{
if (!$criteria) {
$criteria = isset($this->criteria) ? $this->criteria : new TCriteria();
}
// creates a SELECT statement
$sql = new TSqlSelect();
$sql->addColumn('count(*)');
$sql->setEntity($this->getEntity());
// assign the criteria to the SELECT statement
$sql->setCriteria($criteria);
// get the connection of the active transaction
if ($conn = TTransaction::get()) {
// register the operation in the LOG file
TTransaction::log($sql->getInstruction());
$dbinfo = TTransaction::getDatabaseInfo();
// get dbinfo
if (isset($dbinfo['prep']) and $dbinfo['prep'] == '1') {
$result = $conn->prepare($sql->getInstruction(TRUE), array(PDO::ATTR_CURSOR => PDO::CURSOR_FWDONLY));
$result->execute($criteria->getPreparedVars());
} else {
// executes the SELECT statement
$result = $conn->query($sql->getInstruction());
}
if ($result) {
$row = $result->fetch();
}
// returns the result
return $row[0];
} else {
// if there's no active transaction opened
throw new Exception(AdiantiCoreTranslator::translate('No active transactions') . ': ' . __METHOD__ . ' ' . $this->getEntity());
}
}
/**
* Delete an Active Record object from the database
* @param [$id] The Object ID
* @exception Exception if there's no active transaction opened
*/
public function delete($id = NULL)
{
$class = get_class($this);
// discover the primary key name
$pk = $this->getPrimaryKey();
// if the user has not passed the ID, take the object ID
$id = $id ? $id : $this->{$pk};
// creates a DELETE instruction
$sql = new TSqlDelete();
$sql->setEntity($this->getEntity());
// creates a select criteria
$criteria = new TCriteria();
$criteria->add(new TFilter($pk, '=', $id));
// assign the criteria to the delete instruction
$sql->setCriteria($criteria);
// get the connection of the active transaction
if ($conn = TTransaction::get()) {
// register the operation in the LOG file
TTransaction::log($sql->getInstruction());
$dbinfo = TTransaction::getDatabaseInfo();
// get dbinfo
if (isset($dbinfo['prep']) and $dbinfo['prep'] == '1') {
$result = $conn->prepare($sql->getInstruction(TRUE), array(PDO::ATTR_CURSOR => PDO::CURSOR_FWDONLY));
$result->execute($criteria->getPreparedVars());
} else {
// execute the query
$result = $conn->query($sql->getInstruction());
}
unset($this->data);
if ($cache = $this->getCacheControl()) {
$record_key = $class . '[' . $id . ']';
if ($cache::delValue($record_key)) {
TTransaction::log($record_key . ' deleted from cache');
}
}
// return the result of the exec() method
return $result;
} else {
// if there's no active transaction opened
throw new Exception(AdiantiCoreTranslator::translate('No active transactions') . ': ' . __METHOD__ . ' ' . $this->getEntity());
}
}