class BasicUsageObserver in Changed Fields API 8.3

Implementation of an example observer.

Hierarchy

• class \Drupal\changed_fields_basic_usage\BasicUsageObserver implements ObserverInterface

1 file declares its use of BasicUsageObserver

changed_fields_basic_usage.module in examples/changed_fields_basic_usage/changed_fields_basic_usage.module

This is the Changed Fields Basic Usage example module.

File

examples/changed_fields_basic_usage/src/BasicUsageObserver.php, line 10

Namespace

Drupal\changed_fields_basic_usage

class BasicUsageObserver implements ObserverInterface {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    return [
      'node' => [
        'article' => [
          'title',
          'body',
        ],
      ],
      'user' => [
        'user' => [
          'name',
          'mail',
        ],
      ],
      'taxonomy_term' => [
        'tags' => [
          'name',
          'description',
        ],
      ],
      'comment' => [
        'comment' => [
          'subject',
          'comment_body',
        ],
      ],
      'shortcut' => [
        'default' => [
          'title',
          'link',
        ],
      ],
      'menu_link_content' => [
        'menu_link_content' => [
          'title',
          'link',
        ],
      ],
      'media' => [
        'image' => [
          'name',
          'field_media_image',
        ],
      ],
      'block_content' => [
        'basic' => [
          'info',
          'body',
        ],
      ],
      'aggregator_feed' => [
        'aggregator_feed' => [
          'title',
          'refresh',
        ],
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function update(\SplSubject $entity_subject) {
    $entity = $entity_subject
      ->getEntity();
    $changed_fields = $entity_subject
      ->getChangedFields();

    // Do something with $entity depends on $changed_fields.
  }

}

Members

Name	Modifiers	Type	Description	Overrides
BasicUsageObserver::getInfo	public	function	Returns info for field comparator plugins. Overrides ObserverInterface::getInfo
BasicUsageObserver::update	public	function