protected function FormValidator::performRequiredValidation in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Form/FormValidator.php \Drupal\Core\Form\FormValidator::performRequiredValidation()

Performs validation of elements that are not subject to limited validation.

Parameters

array $elements: An associative array containing the structure of the form.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form. The current user-submitted data is stored in $form_state->getValues(), though form validation functions are passed an explicit copy of the values for the sake of simplicity. Validation handlers can also $form_state to pass information on to submit handlers. For example: $form_state->set('data_for_submission', $data); This technique is useful when validation requires file parsing, web service requests, or other expensive requests that should not be repeated in the submission step.

1 call to FormValidator::performRequiredValidation()

FormValidator::doValidateForm in core/lib/Drupal/Core/Form/FormValidator.php

Performs validation on form elements.

File

core/lib/Drupal/Core/Form/FormValidator.php, line 329

Class

FormValidator

Provides validation of form submissions.

Namespace

Drupal\Core\Form

Code

protected function performRequiredValidation(&$elements, FormStateInterface &$form_state) {

  // Verify that the value is not longer than #maxlength.
  if (isset($elements['#maxlength']) && mb_strlen($elements['#value']) > $elements['#maxlength']) {
    $form_state
      ->setError($elements, $this
      ->t('@name cannot be longer than %max characters but is currently %length characters long.', [
      '@name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'],
      '%max' => $elements['#maxlength'],
      '%length' => mb_strlen($elements['#value']),
    ]));
  }
  if (isset($elements['#options']) && isset($elements['#value'])) {
    if ($elements['#type'] == 'select') {
      $options = OptGroup::flattenOptions($elements['#options']);
    }
    else {
      $options = $elements['#options'];
    }
    if (is_array($elements['#value'])) {
      $value = in_array($elements['#type'], [
        'checkboxes',
        'tableselect',
      ]) ? array_keys($elements['#value']) : $elements['#value'];
      foreach ($value as $v) {
        if (!isset($options[$v])) {
          $form_state
            ->setError($elements, $this
            ->t('An illegal choice has been detected. Please contact the site administrator.'));
          $this->logger
            ->error('Illegal choice %choice in %name element.', [
            '%choice' => $v,
            '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'],
          ]);
        }
      }
    }
    elseif ($elements['#type'] == 'select' && !$elements['#multiple'] && $elements['#required'] && !isset($elements['#default_value']) && $elements['#value'] === $elements['#empty_value']) {
      $elements['#value'] = NULL;
      $form_state
        ->setValueForElement($elements, NULL);
    }
    elseif (!isset($options[$elements['#value']])) {
      $form_state
        ->setError($elements, $this
        ->t('An illegal choice has been detected. Please contact the site administrator.'));
      $this->logger
        ->error('Illegal choice %choice in %name element.', [
        '%choice' => $elements['#value'],
        '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'],
      ]);
    }
  }
}