/**
* Finds the Compra model based on its primary key value.
* If the model is not found, a 404 HTTP exception will be thrown.
* @param integer $id
* @return Compra the loaded modelCompra
* @throws NotFoundHttpException if the model cannot be found
*/
protected function findModel($id)
{
if (($modelCompra = Compra::findOne($id)) !== null) {
return $modelCompra;
} else {
throw new NotFoundHttpException('The requested page does not exist.');
}
}