How to make hidden field not required?

Question

$form['questionfield_form_fieldset'][$i]['answer_type'] = [
        '#type' => 'radios',
        '#title' => $this->t('Select Answer Type'),
        '#options' => array(
          'select' =>t('Drop Down'),
          'radios' =>t('Radio'),
          'rating' =>t('Rating'),
        ),
        '#description' => $this->t('Select the way answer will disply eg. in radio button or in selectbox(Dropdown)'),
        '#default_value' => $config->get($form_count . '.' . $drupal_form_id . '.' . 'answer_type'),
        '#required' => TRUE,
      ];



      $form['questionfield_form_fieldset'][$i]['answer_box_id'] = [
        '#type' => 'textarea',
        '#title' => $this->t('Answer for above question'),
        '#description' => $this->t('Add your answers for above question here.'),
        '#default_value' => $config->get($form_count . '.' . $drupal_form_id . '.' . 'answer_box_id'),
        '#required' => TRUE,
        '#states' => array(
      'visible' => array(
        array(
        array(":input[name='questionfield_form_fieldset[$i][answer_type]']" => array('value' => 'select')),
        'or',
        array(":input[name='questionfield_form_fieldset[$i][answer_type]']" => array('value' => 'radios')),
      ),
        ),
    ),
      ];

I want to make answer_box_id as not required when user click rating radio button .

Answer 1

You need to remove '#required' => TRUE from the render array.

States only control "soft" changes through javascript. They don't (and can't) have any effect on the backend validation; if they could, it would be trivial for anybody to bypass the server-side validation for a field just by setting some CSS styles on it. That would not be a good situation to get into.

Answer 2

Hello I solve as below..

$form['questionfield_form_fieldset'][$i]['answer_box_id'] = [
        '#type' => 'textarea',
        '#title' => $this->t('Answer for above question'),
        '#description' => $this->t('Add your answers for above question here.'),
        '#default_value' => $config->get($form_count . '.' . $drupal_form_id . '.' . 'answer_box_id'),
        //'#required' => TRUE,
        '#states' => array(
      'visible' => array(
        array(
        array(":input[name='questionfield_form_fieldset[$i][answer_type]']" => array('value' => 'select')),
        'or',
        array(":input[name='questionfield_form_fieldset[$i][answer_type]']" => array('value' => 'radios')),
      ),
        ),
      'required' => array(
        array(
        array(":input[name='questionfield_form_fieldset[$i][answer_type]']" => array('value' => 'select')),
        'or',
        array(":input[name='questionfield_form_fieldset[$i][answer_type]']" => array('value' => 'radios')),
      ),
        ),
    ),
      ];