public function MyFieldExportFormatter::viewElements in REST Views 8

Builds a renderable array for a field value.

Parameters

\Drupal\Core\Field\FieldItemListInterface $items: The field values to be rendered.

string $langcode: The language that should be used to render the field.

Return value

array A renderable array for $items, as an array of child elements keyed by consecutive numeric indexes starting from 0.

Overrides FormatterInterface::viewElements

File

./rest_views.api.php, line 30

Sample field formatter plugin for the REST Views module.

Class

MyFieldExportFormatter

A sample REST-aware field formatter for a custom field.

Namespace

Drupal\my_module\Plugins\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  foreach ($items as $delta => $item) {
    $data = '[A data structure based on $item.]';
    $elements[$delta] = [
      '#type' => 'data',
      '#data' => SerializedData::create($data),
    ];
  }
  return $elements;
}