So I am making a quiz in which the user gets confronted with a succession of questions which he answers through a form. The series of problems each contain a given number of questions, and the questions get asked one after the other when the user validates.
I am therefore trying to re-render the view with the form for each problem until they're all done. This is my action:
public function actionAnswer($id_serie)
{
if ($id_serie != 0) //getting the serie's info
{
$serie = Serie::find()
->where(['id' => $id_serie])
->one();
$problems = (new \yii\db\Query()) //getting the problems in the serie
->select('*')
->from('problems')
->where(['id_serie' => $id_serie])
->all();
$prob_counter = $serie->nbr_of_problems; //counts the number of questions answered
$id_serie = 0;
}
$model = new Answer;
if ($model->load(Yii::$app->request->post()) && $model->validate())
{
$model->save(); // works just fine every time
if (--$prob_counter <= 0)
{
return $this->redirect('index.php?r=student/entry');
}
}
return $this->render('answer',
['model' => $model,
'problems' => $problems,
'serie' => $serie,
'prob_counter' => $prob_counter, //these last two are for debug
'id_serie' => $id_serie]);
}
When this action gets executed the first time, $id_serie is never null or =0. Hence I am using this to query the db only once and set a counter to the total number of problems in the serie. (id est the number of time the user has to submit the form) If his answer is valid, I decrement my counter and if it falls under 0, there are no questions to answer anymore and the user gets redirected.
However, this counter never goes down to 0: it is set correctly, it is decremented only once, and then it never falls lower, no matter where I put the line. (inside or outside any loop) On the other hand the data from the form is properly inserted in the db each time.
What am I getting wrong?