function EntityReferenceAutocompleteWidget::formElement

Overrides WidgetInterface::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,
    ];
}