function Callbacks::validateName

Form element validation handler for 'name' in form_test_validate_form().

File

core/modules/system/tests/modules/form_test/src/Callbacks.php, line 15

Class

Callbacks

Simple class for testing methods as Form API callbacks.

Namespace

Code

public function validateName(&$element, FormStateInterface $form_state) {
    $triggered = FALSE;
    if ($form_state->getValue('name') == 'element_validate') {
        // Alter the form element.
        $element['#value'] = '#value changed by #element_validate';
        // Alter the submitted value in $form_state.
        $form_state->setValueForElement($element, 'value changed by setValueForElement() in #element_validate');
        $triggered = TRUE;
    }
    if ($form_state->getValue('name') == 'element_validate_access') {
        $form_state->set('form_test_name', $form_state->getValue('name'));
        // Alter the form element.
        $element['#access'] = FALSE;
        $triggered = TRUE;
    }
    elseif ($form_state->has('form_test_name')) {
        // To simplify this test, just take over the element's value into $form_state.
        $form_state->setValueForElement($element, $form_state->get('form_test_name'));
        $triggered = TRUE;
    }
    if ($triggered) {
        // Output the element's value from $form_state.
        \Drupal::messenger()->addStatus(t('@label value: @value', [
            '@label' => $element['#title'],
            '@value' => $form_state->getValue('name'),
        ]));
        // Trigger a form validation error to see our changes.
        $form_state->setErrorByName('');
    }
}