Inheritance: extends yii\db\ActiveRecord
 public function error($producer, $message)
 {
     $error = "\n[" . $producer . "] warns";
     $error .= ' << ' . $message . ' >>';
     Yii::error($error);
     $error = new Error();
     $error->source = $producer;
     $error->description = $message;
     $error->save();
 }
 /**
  * Finds the Error model based on its primary key value.
  * If the model is not found, a 404 HTTP exception will be thrown.
  * @param integer $id
  * @return Error the loaded model
  * @throws NotFoundHttpException if the model cannot be found
  */
 protected function findModel($id)
 {
     if (($model = Error::findOne($id)) !== null) {
         return $model;
     } else {
         throw new NotFoundHttpException('The requested page does not exist.');
     }
 }