public function ExampleMultilingualField::viewElements in Extra Field 8

Same name and namespace in other branches

1. 8.2 modules/extra_field_example/src/Plugin/ExtraField/Display/ExampleMultilingualField.php \Drupal\extra_field_example\Plugin\ExtraField\Display\ExampleMultilingualField::viewElements()

Returns the renderable array of the field item(s).

Parameters

\Drupal\Core\Entity\ContentEntityInterface $entity: The field's host entity.

Return value

array A renderable array of field elements. If this contains children, the field output will be rendered as a multiple value field with each child as a field item.

Overrides ExtraFieldDisplayFormattedInterface::viewElements

File

modules/extra_field_example/src/Plugin/ExtraField/Display/ExampleMultilingualField.php, line 25

Class

ExampleMultilingualField

Example Extra field Display.

Namespace

Drupal\extra_field_example\Plugin\ExtraField\Display

Code

public function viewElements(ContentEntityInterface $entity) {
  $elements = [];
  $cache = new CacheableMetadata();
  $tagsField = $this
    ->getTagsField();
  if ($tagsField && !$tagsField
    ->isEmpty()) {

    // Build the field output as a concatenated string of tags.
    $tags = [];
    foreach ($tagsField as $item) {

      /** @var \Drupal\Core\Entity\ContentEntityInterface $tag */
      $tag = $item->entity;
      $tags[] = $tag
        ->label();
      $cache
        ->addCacheableDependency($tag);
    }
    $elements = [
      '#markup' => implode(', ', $tags),
    ];
  }
  else {

    // Mark the result as empty to make sure no field wrapper is applied.
    $this->isEmpty = TRUE;
  }
  $cache
    ->applyTo($elements);
  return $elements;
}