/Drupal 8

function hook_entity_display_build_alter

hook_entity_display_build_alter(&$build, $context)

Alter the render array generated by an EntityDisplay for an entity.


array $build: The renderable array generated by the EntityDisplay.

array $context: An associative array containing:

  • entity: The entity being rendered.
  • view_mode: The view mode; for example, 'full' or 'teaser'.
  • display: The EntityDisplay holding the display options.

Related topics

Entity CRUD, editing, and view hooks
Hooks used in various entity operations.
Define functions that alter the behavior of Drupal core.


core/lib/Drupal/Core/Entity/entity.api.php, line 1559
Hooks and documentation related to entities.


function hook_entity_display_build_alter(&$build, $context) {
  // Append RDF term mappings on displayed taxonomy links.
  foreach (Element::children($build) as $field_name) {
    $element = &$build[$field_name];
    if ($element['#field_type'] == 'entity_reference' && $element['#formatter'] == 'entity_reference_label') {
      foreach ($element['#items'] as $delta => $item) {
        $term = $item->entity;
        if (!empty($term->rdf_mapping['rdftype'])) {
          $element[$delta]['#options']['attributes']['typeof'] = $term->rdf_mapping['rdftype'];
        if (!empty($term->rdf_mapping['name']['predicates'])) {
          $element[$delta]['#options']['attributes']['property'] = $term->rdf_mapping['name']['predicates'];

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