public AccountPermissionsCacheContext::getCacheableMetadata()
Gets the cacheability metadata for the context.
There are three valid cases for the returned CacheableMetadata object:
- An empty object means this can be optimized away safely.
- A max-age of 0 means that this context can never be optimized away. It will never bubble up and cache tags will not be used.
- Any non-zero max-age and cache tags will bubble up into the cache item if this is optimized away to allow for invalidation if the context value changes.
Return value
\Drupal\Core\Cache\CacheableMetadata A cacheable metadata object.
Overrides CacheContextInterface::getCacheableMetadata
File
- core/lib/Drupal/Core/Cache/Context/AccountPermissionsCacheContext.php, line 53
Class
- AccountPermissionsCacheContext
- Defines the AccountPermissionsCacheContext service, for "per permission" caching.
Namespace
Drupal\Core\Cache\Context
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 | public function getCacheableMetadata() { $cacheable_metadata = new CacheableMetadata(); // The permissions hash changes when: // - a user is updated to have different roles; $tags = ['user:' . $this->user->id()]; // - a role is updated to have different permissions. foreach ($this->user->getRoles() as $rid) { $tags[] = "config:user.role.$rid"; } return $cacheable_metadata->setCacheTags($tags);} |
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