Implementing a form, D8 beta 1

I wrote an earlier post about the rudiments of how to implement a simple form for Drupal 8. There have been several related API changes since then, but that post has a number of notes that are still accurate and useful.

The original post is at http://optimizely-to-drupal-8.blogspot.com/2014/05/implementing-forms.html   You really should read that post first, then come back to this one for the current code.

In this posting, I am only providing an update of the code sample for the class that defines the form. You may want to read the earlier post as well.

Again, this is  only an extract from the class definition. To keep it short and to the point, I've omitted parts of the bodies of the methods as well as boilerplate comments. 

Code changes from the original post are in boldface.


namespace Drupal\optimizely;
 
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
 
class AccountInfoForm extends FormBase {

  public function getFormID() {
    return 'optimizely_account_info';
  }
 
  public function buildForm(array $form, 
                            FormStateInterface $form_state) {    
    $form['optimizely_id'] = array(      
      '#type' => 'textfield',
      '#title' => t('Optimizely ID Number'),
      '#size' => 60,
      '#maxlength' => 256,
      '#required' => TRUE,
    );
    $form['actions'] = array('#type' => 'actions', );
    $form['actions']['submit'] = array(
      '#type' => 'submit',
      '#value' => 'Submit',
    );

    return $form;
  }
 
  public function validateForm(array &$form,
                               FormStateInterface $form_state) {
    $oid = $form_state->getValue('optimizely_id');
 
    if (!preg_match('/^\d+$/', $oid)) {
      $form_state->setErrorByName(
        'optimizely_id',
        t('Your Optimizely ID should be numeric.'));    }
  }
 
  public function submitForm(array &$form, 
                             FormStateInterface $form_state) {
    // Code to update the database ...
    //    . . . . .

    drupal_set_message(t('The default project ...'),
                       'status');    
    // Redirect back to projects listing.
    $form_state->setRedirect('optimizely.listing');
    return;
  }
}  

Related Posts.

Drupal 8: alpha 13 --> alpha 14
http://optimizely-to-drupal-8.blogspot.com/2014/08/drupal-8-alpha-13-alpha-14.html

FormStateInterface, and drupal_valid_path()
http://optimizely-to-drupal-8.blogspot.com/2014/09/formstateinterface-and-drupalvalidpath.html