public BookNavigationCacheContext::getContext()
Returns the string representation of the cache context.
A cache context service's name is used as a token (placeholder) cache key, and is then replaced with the string returned by this method.
Return value
string The string representation of the cache context.
Overrides CacheContextInterface::getContext
File
- core/modules/book/src/Cache/BookNavigationCacheContext.php, line 54
Class
- BookNavigationCacheContext
- Defines the book navigation cache context service.
Namespace
Drupal\book\Cache
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | public function getContext() { // Find the current book's ID. $current_bid = 0; if ($node = $this->requestStack->getCurrentRequest()->get('node')) { $current_bid = empty($node->book['bid']) ? 0 : $node->book['bid']; } // If we're not looking at a book node, then we're not navigating a book. if ($current_bid === 0) { return 'book.none'; } // If we're looking at a book node, get the trail for that node. $active_trail = $this->container->get('book.manager') ->getActiveTrailIds($node->book['bid'], $node->book); return implode('|', $active_trail);} |
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