public function PollForm::validateForm in Poll 8

Button-level validation handlers are highly discouraged for entity forms, as they will prevent entity validation from running. If the entity is going to be saved during the form submission, this method should be manually invoked from the button-level validation handler, otherwise an exception will be thrown.

Overrides ContentEntityForm::validateForm

File

src/Form/PollForm.php, line 42

Class

PollForm

Form controller for the poll edit forms.

Namespace

Drupal\poll\Form

Code

public function validateForm(array &$form, FormStateInterface $form_state) {
  $poll = $this
    ->buildEntity($form, $form_state);

  // Check for duplicate titles.
  $poll_storage = $this->entityTypeManager
    ->getStorage('poll');
  $result = $poll_storage
    ->getPollDuplicates($poll);
  foreach ($result as $item) {
    if (strcasecmp($item
      ->label(), $poll
      ->label()) == 0) {
      $form_state
        ->setErrorByName('question', $this
        ->t('A feed named %feed already exists. Enter a unique question.', array(
        '%feed' => $poll
          ->label(),
      )));
    }
  }
  parent::validateForm($form, $form_state);
}