public function GetRateForDate($id, $date)
{
$criteria = new CDbCriteria();
$criteria->select = 'value';
$criteria->addColumnCondition(array('currency_id' => $id));
$criteria->addColumnCondition(array('date' => $date));
$model = Currates::model();
$value = $model->commandBuilder->createFindCommand($model->tableName(), $criteria)->queryScalar();
return $value;
}
