3 namespace Drupal\batch_test\Form;
5 use Drupal\Core\Form\FormBase;
6 use Drupal\Core\Form\FormStateInterface;
9 * Generate form of id batch_test_multistep_form.
11 class BatchTestMultiStepForm extends FormBase {
16 public function getFormId() {
17 return 'batch_test_multistep_form';
23 public function buildForm(array $form, FormStateInterface $form_state) {
24 $step = $form_state->get('step');
27 $form_state->set('step', $step);
30 $form['step_display'] = [
31 '#markup' => 'step ' . $step . '<br/>',
38 // This is a POST form with multiple steps that does not transition from one
39 // step to the next via POST requests, but via GET requests, because it uses
40 // Batch API to advance through the steps.
41 $form['#cache']['max-age'] = 0;
49 public function submitForm(array &$form, FormStateInterface $form_state) {
50 batch_test_stack(NULL, TRUE);
52 $step = $form_state->get('step');
55 batch_set(_batch_test_batch_1());
58 batch_set(_batch_test_batch_2());
63 $form_state->set('step', ++$step);
64 $form_state->setRebuild();
67 $form_state->setRedirect('batch_test.redirect');