function EntityReferenceAutocompleteWidget::formElement

Overrides WidgetBase::formElement

File

core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php, line 95

Class

EntityReferenceAutocompleteWidget

Plugin implementation of the 'entity_reference_autocomplete' widget.

Namespace

Code

public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
  $entity = $items->getEntity();
  $referenced_entities = $items->referencedEntities();
  $selection_settings = [];
  // Append the match operation to the selection settings.
  if ($this->getFieldSetting('handler_settings') !== NULL) {
    $selection_settings = $this->getFieldSetting('handler_settings');
  }
  $selection_settings += [
    'match_operator' => $this->getSetting('match_operator'),
    'match_limit' => $this->getSetting('match_limit'),
  ];
  // Append the entity if it is already created.
  if (!$entity->isNew()) {
    $selection_settings['entity'] = $entity;
  }
  $element += [
    '#type' => 'entity_autocomplete',
    '#target_type' => $this->getFieldSetting('target_type'),
    '#selection_handler' => $this->getFieldSetting('handler'),
    '#selection_settings' => $selection_settings,
    // Entity reference field items are handling validation themselves via
    // the 'ValidReference' constraint.
'#validate_reference' => FALSE,
    '#maxlength' => 1024,
    '#default_value' => $referenced_entities[$delta] ?? NULL,
    '#size' => $this->getSetting('size'),
    '#placeholder' => $this->getSetting('placeholder'),
  ];
  if ($bundle = $this->getAutocreateBundle()) {
    $element['#autocreate'] = [
      'bundle' => $bundle,
      'uid' => $entity instanceof EntityOwnerInterface ? $entity->getOwnerId() : \Drupal::currentUser()->id(),
    ];
  }
  return [
    'target_id' => $element,
  ];
}