public NodeViewController::view(EntityInterface $node, $view_mode = 'full', $langcode = NULL)
Provides a page to render a single entity.
Parameters
\Drupal\Core\Entity\EntityInterface $_entity: The Entity to be rendered. Note this variable is named $_entity rather than $entity to prevent collisions with other named placeholders in the route.
string $view_mode: (optional) The view mode that should be used to display the entity. Defaults to 'full'.
Return value
array A render array as expected by drupal_render().
Overrides EntityViewController::view
File
- core/modules/node/src/Controller/NodeViewController.php, line 54
Class
- NodeViewController
- Defines a controller to render a single node.
Namespace
Drupal\node\Controller
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | public function view(EntityInterface $node, $view_mode = 'full', $langcode = NULL) { $build = parent::view($node, $view_mode, $langcode); foreach ($node->uriRelationships() as $rel) { $url = $node->toUrl($rel); // Add link relationships if the user is authenticated or if the anonymous // user has access. Access checking must be done for anonymous users to // avoid traffic to inaccessible pages from web crawlers. For // authenticated users, showing the links in HTML head does not impact // user experience or security, since the routes are access checked when // visited and only visible via view source. This prevents doing // potentially expensive and hard to cache access checks on every request. // This means that the page will vary by user.permissions. We also rely on // the access checking fallback to ensure the correct cacheability // metadata if we have to check access. if ($this->currentUser->isAuthenticated() || $url->access($this->currentUser)) { // Set the node path as the canonical URL to prevent duplicate content. $build['#attached']['html_head_link'][] = array( array( 'rel' => $rel, 'href' => $url->toString(), ), TRUE, ); } if ($rel == 'canonical') { // Set the non-aliased canonical path as a default shortlink. $build['#attached']['html_head_link'][] = array( array( 'rel' => 'shortlink', 'href' => $url->setOption('alias', TRUE)->toString(), ), TRUE, ); } } // Given this varies by $this->currentUser->isAuthenticated(), add a cache // context based on the anonymous role. $build['#cache']['contexts'][] = 'user.roles:anonymous'; return $build;} |
Please login to continue.