function hook_ENTITY_TYPE_view

hook_ENTITY_TYPE_view(array &$build, \Drupal\Core\Entity\EntityInterface $entity, \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display, $view_mode)

Act on entities of a particular type being assembled before rendering.

Parameters

&$build: A renderable array representing the entity content. The module may add elements to $build prior to rendering. The structure of $build is a renderable array as expected by drupal_render().

\Drupal\Core\Entity\EntityInterface $entity: The entity object.

\Drupal\Core\Entity\Display\EntityViewDisplayInterface $display: The entity view display holding the display options configured for the entity components.

$view_mode: The view mode the entity is rendered in.

See also

hook_ENTITY_TYPE_view_alter()

hook_entity_view()

Related topics

Entity CRUD, editing, and view hooks

Hooks used in various entity operations.

Hooks

Define functions that alter the behavior of Drupal core.

File

core/lib/Drupal/Core/Entity/entity.api.php, line 1322

Hooks and documentation related to entities.

Code

function hook_ENTITY_TYPE_view(array &$build, \Drupal\Core\Entity\EntityInterface $entity, \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display, $view_mode) {
  // Only do the extra work if the component is configured to be displayed.
  // This assumes a 'mymodule_addition' extra field has been defined for the
  // entity bundle in hook_entity_extra_field_info().
  if ($display->getComponent('mymodule_addition')) {
    $build['mymodule_addition'] = array(
      '#markup' => mymodule_addition($entity),
      '#theme' => 'mymodule_my_additional_field',
    );
  }
}