Validating array of inputs in a form Yii2 - validation

Question

I have been developing a system to create a dynamic questioner, where an organizer can create questions for a user to respond, but I have been having trouble validating the answers of the users to the questioners. I have three types of inputs available for the organizer to create, a short answer, a long answer and an input field. I tried using the Each validation rule, but it doesn’t seem to be working. I search all around for an answer to this, but I didn't find anything that worked.
Here is my code.
View
<?php $form = ActiveForm::begin([ 'id' => 'respuesta-form', 'enableAjaxValidation' => true, 'options' => ['enctype' => 'multipart/form-data'], ]); ?>
<?php foreach ($preguntas as $i => $pregunta): ?>
<?php if($pregunta->tipo == 1): ?>
<?= $form->field($model, "respuesta[$i]")->textInput(['maxlength' => true])->label("<strong>" . $pregunta->descripcion . "</strong>") ?>
<?php endif; ?>
<?php if($pregunta->tipo == 2): ?>
<?= $form->field($model, "respuesta[$i]")->textarea(['maxlength' => true], ["style" => "resize: none;"])->label("<strong>" . $pregunta->descripcion . "</strong>") ?>
<?php endif; ?>
<?php if($pregunta->tipo == 3): ?>
<?= $form->field($model, "respuesta[$i]")->fileInput()->label("<strong>" . $pregunta->descripcion . "</strong>") ?>
<?php endif; ?>
<?php endforeach; ?>
<div class="form-group">
<?= Html::submitButton('Guardar', ['class' => 'btn btn-success']) ?>
</div>
<?php ActiveForm::end(); ?>
Model
public function rules()
{
return [
[['idpregunta', 'idinscripcion'], 'required'],
['respuesta', 'each', 'rule' => ['required']],
[['idpregunta', 'idinscripcion'], 'integer'],
[['respuesta'], 'string', 'max' => 500],
[['idpregunta'], 'exist', 'skipOnError' => true, 'targetClass' => Pregunta::className(), 'targetAttribute' => ['idpregunta' => 'id']],
[['idinscripcion'], 'exist', 'skipOnError' => true, 'targetClass' => Inscripcion::className(), 'targetAttribute' => ['idinscripcion' => 'idInscripcion']],
];
}
Controller
public function actionResponderFormulario($slug){
$evento = $this->findModel("", $slug);
$inscripcion = Inscripcion::find()->where(["idEvento" => $evento->idEvento, "idUsuario" => Yii::$app->user->identity->idUsuario])->one();
$preguntas = Pregunta::find()->where(["idevento" => $evento->idEvento])->all();
$model = new Pregunta();
if($inscripcion ==null){
$preguntas = Pregunta::find()->where(["idevento" => $evento->idEvento])->all();
return $this->render('responderFormulario',
["preguntas" => $preguntas,
"eventos" => $evento,
"model" => $model]);
}
}
The most important thing for me is for the questions to validate in general, I don’t care that much to validate each type separately, because I may remove this later.
Thank you in advance

Answer 1

I think this part of string validation with max length should change to this:
['respueusta', 'each', 'rule' => ['string', 'max' => 500]]
Sometime respuesta field receives the file in tipo=3 , you can not do this for clean and structured code. define another field for files.