Create survey form in Yii2 with multiple choice answers - php

Question

Im new to Yii, and would appreciate any help.
I need to create a page with multiple choice poll. My models look like this:
PollQuestion:
id int
title varchar
PollAnswer
id char //one letter - answer option
title
question_id //FK pool_question(id)
PollResult
user_id int
question_id int //FK poll_question(id)
answers //will be stored like A,B,C
indicated_answer //alternaive answer specified by user
Sample question looks like:
What do you think about us?
(checkbox)A. Good
(checkbox)B.Bad
(checkbox)C.Other (indicate) (textbox goes here)
Im not sure if Im doing it right, my controller:
public function actionSurvey($user_id)
{
$model = [new PollResult];
foreach($model as $model_item){
$model_item->user_id= $user_id;
if ($model_item->load(Yii::$app->request->post())) {
//only one item received, why??
}
}
return $this->render('survey', ['model' => $model]);
}
View:
<?php $form = ActiveForm::begin(); ?>
<?php foreach(PollQuestion::find()->all() as $question) {?>
<?php foreach($model as $model_item) { ?>
<p><?=$question->title?></p>
<?= Html::activeHiddenInput($model_item , "user_id"); ?>
<?= $form->field($model_item, 'answers')->checkboxList(ArrayHelper::map($question->pollAnswers, 'id', 'title')?>
<?= $form->field($model_item, 'indicated_answer') ->textInput()?>
<?php } }?>
<div class="form-group">
<?= Html::submitButton(Yii::t('app', 'Send'), ['class' => 'btn btn-success' ]) ?> </div>
<?php ActiveForm::end(); ?>
The problem is that in controller i receive only one item in array. Im not sure what am I doing wrong.

Answer 1

My suggestion, you need an extra form model to do that.
You can see how to create form model on http://www.yiiframework.com/doc-2.0/guide-input-forms.html.
The form model you create at least has this attributes:
answers[]
indicated_answer[]
and you can save input from user to that attributes and save them into your ActiveRecord model.

Answer 2

It is correct that one model entry is returned. In your form, you are creating a single model and passing that to the form.
public function actionSurvey($user_id)
{
$model = [new PollResult];
// ...
return $this->render('survey', ['model' => $model]);
}
You can then expect a single model back.
Have a look at this related issue on how you can solve this.
Utilising Yii2.0 checkboxlist for Parent-child relation models