Yii2 form without updating via Pjax?

Question

Yii

Hello.
Is it possible in yii2 to make a form in which the elements will be changed dynamically by pjax, but so that the rest of the form fields are not updated? And if not, how should it be done? JS?
For example, here is the code

<? Pjax::begin(['enablePushState' => false]); ?>
    <?php $form = ActiveForm::begin(['options' => ['data-pjax' => '1']]); ?>    

    <?= $form->field($modelCouples[0], "[0]id_driver")->dropDownList($driver)?>
    
    <?         
        if (count($modelCouples) == 2) echo $form->field($modelCouples[1], "[1]id_driver")
                                        ->dropDownList($driver);
    ?>

    <? 
            if (count($modelCouples) == 1) echo Html::a('+', ['/trip/create?action=new'],['class' => 'btn btn-primary']);
            else echo Html::a('-', ['/trip/create?action=one'],['class' => 'btn btn-primary']);
    ?>    

    <?= $form->field($model, 'id_tc')->dropDownList($car) ?>

    <?  
        $param = ['prompt' => 'Выберите прицеп'];
        echo $form->field($model, 'id_trailer')->dropDownList($trailer,$param);      
    ?>

    <?= $form->field($model, 'Distance')->textInput() ?>

    <div class="form-group">
        <?= Html::submitButton($model->isNewRecord ? 'Создать' : 'Изменить', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
    </div>

    <?php ActiveForm::end(); ?>
    <? Pjax::end(); ?>

Here, after clicking on the button, the entire form is updated, how to make sure that the entered data is not updated?

Answer 1

it's better not to confuse dynamic form changes with sending it to the server - after all, each call to the server is a load on it. For dynamic change it is better to use JS.
If you still decide to use Pjax for this purpose, just load the data from the post into the model
if (Yii::$app->request->isPost){
$model->load(Yii::$app->request->post())
}