public function getQuizResult($answersSum)
{
return QuizResults::find()->where("'" . $answersSum . "' BETWEEN value_from AND value_to AND quiz_id=" . $this->id)->one()['text'];
}
/**
* Deletes an existing Quiz model.
* If deletion is successful, the browser will be redirected to the 'index' page.
* @param integer $id
* @return mixed
*/
public function actionDelete($id)
{
$this->findModel($id)->delete();
QuizResults::deleteAll(['quiz_id' => $id]);
QuizQuestions::deleteAll(['quiz_id' => $id]);
return $this->redirect(['index']);
}