protected function View::addCacheMetadata in Zircon Profile 8
Same name and namespace in other branches
- 8.0 core/modules/views/src/Entity/View.php \Drupal\views\Entity\View::addCacheMetadata()
Fills in the cache metadata of this view.
Cache metadata is set per view and per display, and ends up being stored in the view's configuration. This allows Views to determine very efficiently:
- the max-age
- the cache contexts
- the cache tags
In other words: this allows us to do the (expensive) work of initializing Views plugins and handlers to determine their effect on the cacheability of a view at save time rather than at runtime.
1 call to View::addCacheMetadata()
- View::preSave in core/
modules/ views/ src/ Entity/ View.php - Acts on an entity before the presave hook is invoked.
File
- core/
modules/ views/ src/ Entity/ View.php, line 322 - Contains \Drupal\views\Entity\View.
Class
- View
- Defines a View configuration entity class.
Namespace
Drupal\views\EntityCode
protected function addCacheMetadata() {
$executable = $this
->getExecutable();
$current_display = $executable->current_display;
$displays = $this
->get('display');
foreach (array_keys($displays) as $display_id) {
$display =& $this
->getDisplay($display_id);
$executable
->setDisplay($display_id);
$cache_metadata = $executable
->getDisplay()
->calculateCacheMetadata();
$display['cache_metadata']['max-age'] = $cache_metadata
->getCacheMaxAge();
$display['cache_metadata']['contexts'] = $cache_metadata
->getCacheContexts();
$display['cache_metadata']['tags'] = $cache_metadata
->getCacheTags();
// Always include at least the 'languages:' context as there will most
// probably be translatable strings in the view output.
$display['cache_metadata']['contexts'] = Cache::mergeContexts($display['cache_metadata']['contexts'], [
'languages:' . LanguageInterface::TYPE_INTERFACE,
]);
}
// Restore the previous active display.
$executable
->setDisplay($current_display);
}