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<?php
namespace Drupal\field_test\Form;
use Drupal\Core\Entity\EntityChangedInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Entity\Entity\EntityFormDisplay;
/**
* Provides a form for field_test routes.
*
* @internal
*/
class NestedEntityTestForm extends FormBase {
/**
* {@inheritdoc]
*/
public function getFormId() {
return 'field_test_entity_nested_form';
}
/**
* {@inheritdoc]
*/
public function buildForm(array $form, FormStateInterface $form_state, EntityInterface $entity_1 = NULL, EntityInterface $entity_2 = NULL) {
// First entity.
$form_state->set('entity_1', $entity_1);
$form_display_1 = EntityFormDisplay::collectRenderDisplay($entity_1, 'default');
$form_state->set('form_display_1', $form_display_1);
$form_display_1->buildForm($entity_1, $form, $form_state);
// Second entity.
$form_state->set('entity_2', $entity_2);
$form_display_2 = EntityFormDisplay::collectRenderDisplay($entity_2, 'default');
$form_state->set('form_display_2', $form_display_2);
$form['entity_2'] = [
'#type' => 'details',
'#title' => t('Second entity'),
'#tree' => TRUE,
'#parents' => ['entity_2'],
'#weight' => 50,
'#attributes' => ['class' => ['entity-2']]
];
$form_display_2->buildForm($entity_2, $form['entity_2'], $form_state);
if ($entity_2 instanceof EntityChangedInterface) {
// Changed must be sent to the client, for later overwrite error checking.
// @see Drupal\field\Tests\NestedFormTest::testNestedEntityFormEntityLevelValidation()
$form['entity_2']['changed'] = [
'#type' => 'hidden',
'#default_value' => $entity_1->getChangedTime(),
];
}
$form['save'] = [
'#type' => 'submit',
'#value' => t('Save'),
'#weight' => 100,
];
return $form;
}
/**
* {@inheritdoc]
*/
public function validateForm(array &$form, FormStateInterface $form_state) {
$entity_1 = $form_state->get('entity_1');
/** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $form_display_1 */
$form_display_1 = $form_state->get('form_display_1');
$form_display_1->extractFormValues($entity_1, $form, $form_state);
$form_display_1->validateFormValues($entity_1, $form, $form_state);
$entity_2 = $form_state->get('entity_2');
/** @var \Drupal\Core\Entity\Display\EntityFormDisplayInterface $form_display_2 */
$form_display_2 = $form_state->get('form_display_2');
$extracted = $form_display_2->extractFormValues($entity_2, $form['entity_2'], $form_state);
// Extract the values of fields that are not rendered through widgets, by
// simply copying from top-level form values. This leaves the fields that
// are not being edited within this form untouched.
// @see Drupal\field\Tests\NestedFormTest::testNestedEntityFormEntityLevelValidation()
foreach ($form_state->getValues()['entity_2'] as $name => $values) {
if ($entity_2->hasField($name) && !isset($extracted[$name])) {
$entity_2->set($name, $values);
}
}
$form_display_2->validateFormValues($entity_2, $form['entity_2'], $form_state);
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
/** @var \Drupal\Core\Entity\EntityInterface $entity_1 */
$entity_1 = $form_state->get('entity_1');
$entity_1->save();
/** @var \Drupal\Core\Entity\EntityInterface $entity_2 */
$entity_2 = $form_state->get('entity_2');
$entity_2->save();
$this->messenger()->addStatus($this->t('test_entities @id_1 and @id_2 have been updated.', ['@id_1' => $entity_1->id(), '@id_2' => $entity_2->id()]));
}
}
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