protected FormValidator::performRequiredValidation(&$elements, FormStateInterface &$form_state)
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', $data); This technique is useful when validation requires file parsing, web service requests, or other expensive requests that should not be repeated in the submission step.
File
- core/lib/Drupal/Core/Form/FormValidator.php, line 326
Class
- FormValidator
- Provides validation of form submissions.
Namespace
Drupal\Core\Form
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | protected function performRequiredValidation(&$elements, FormStateInterface &$form_state) { // Verify that the value is not longer than #maxlength. if (isset($elements['#maxlength']) && Unicode::strlen($elements['#value']) > $elements['#maxlength']) { $form_state->setError($elements, $this->t('@name cannot be longer than %max characters but is currently %length characters long.', array('@name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'], '%max' => $elements['#maxlength'], '%length' => Unicode::strlen($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'], array('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.', array('%choice' => $v, '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'])); } } } // Non-multiple select fields always have a value in HTML. If the user // does not change the form, it will be the value of the first option. // Because of this, form validation for the field will almost always // pass, even if the user did not select anything. To work around this // browser behavior, required select fields without a #default_value // get an additional, first empty option. In case the submitted value // is identical to the empty option's value, we reset the element's // value to NULL to trigger the regular #required handling below. // @see \Drupal\Core\Render\Element\Select::processSelect() elseif ($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.', array('%choice' => $elements['#value'], '%name' => empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'])); } }} |
Please login to continue.