public function BookNavigationBlock::getCacheContexts in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/book/src/Plugin/Block/BookNavigationBlock.php \Drupal\book\Plugin\Block\BookNavigationBlock::getCacheContexts()

The cache contexts associated with this object.

These identify a specific variation/representation of the object.

Cache contexts are tokens: placeholders that are converted to cache keys by the @cache_contexts_manager service. The replacement value depends on the request context (the current URL, language, and so on). They're converted before storing an object in cache.

Return value

string[] An array of cache context tokens, used to generate a cache ID.

Overrides ContextAwarePluginBase::getCacheContexts

See also

\Drupal\Core\Cache\Context\CacheContextsManager::convertTokensToKeys()

File

core/modules/book/src/Plugin/Block/BookNavigationBlock.php, line 184

Class

BookNavigationBlock

Provides a 'Book navigation' block.

Namespace

Drupal\book\Plugin\Block

Code

public function getCacheContexts() {
  return Cache::mergeContexts(parent::getCacheContexts(), [
    'route.book_navigation',
  ]);
}