function hook_entity_extra_field_info

Exposes "pseudo-field" components on content entities.

Field UI's "Manage fields" and "Manage display" pages let users re-order fields, but also non-field components. For nodes, these include elements exposed by modules through hook_form_alter(), for instance.

Content entities or modules that want to have their components supported should expose them using this hook. The user-defined settings (weight, visible) are automatically applied when entities or entity forms are rendered.

Return value

array The array structure is identical to that of the return value of \Drupal\Core\Entity\EntityFieldManagerInterface::getExtraFields().

See also

hook_entity_extra_field_info_alter()

Related topics

File

core/lib/Drupal/Core/Entity/entity.api.php, line 2242

Hooks and documentation related to entities.

Code

function hook_entity_extra_field_info() {
  $extra = [];
  $module_language_enabled = \Drupal::moduleHandler()
    ->moduleExists('language');
  $description = t('Node module element');
  foreach (NodeType::loadMultiple() as $bundle) {

    // Add also the 'language' select if Language module is enabled and the
    // bundle has multilingual support.
    // Visibility of the ordering of the language selector is the same as on the
    // node/add form.
    if ($module_language_enabled) {
      $configuration = ContentLanguageSettings::loadByEntityTypeBundle('node', $bundle
        ->id());
      if ($configuration
        ->isLanguageAlterable()) {
        $extra['node'][$bundle
          ->id()]['form']['language'] = [
          'label' => t('Language'),
          'description' => $description,
          'weight' => 0,
        ];
      }
    }
    $extra['node'][$bundle
      ->id()]['display']['language'] = [
      'label' => t('Language'),
      'description' => $description,
      'weight' => 0,
      'visible' => FALSE,
    ];
  }
  return $extra;
}