public function ExposedFormPluginBase::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 CacheableDependencyInterface::getCacheContexts

See also

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

File

core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php, line 350

Class

ExposedFormPluginBase

Base class for Views exposed filter form plugins.

Namespace

Code

public function getCacheContexts() {
  $contexts = [];
  if ($this->options['expose_sort_order']) {

    // The sort order query arg is just important in case there is an exposed
    // sort order.
    $has_exposed_sort_handler = FALSE;

    /** @var \Drupal\views\Plugin\views\sort\SortPluginBase $sort_handler */
    foreach ($this->displayHandler
      ->getHandlers('sort') as $sort_handler) {
      if ($sort_handler
        ->isExposed()) {
        $has_exposed_sort_handler = TRUE;
      }
    }
    if ($has_exposed_sort_handler) {
      $contexts[] = 'url.query_args:sort_order';
    }
  }

  // Merge in cache contexts for all exposed filters to prevent display of
  // cached forms.
  foreach ($this->displayHandler
    ->getHandlers('filter') as $filter_handler) {
    if ($filter_handler
      ->isExposed()) {
      $contexts = Cache::mergeContexts($contexts, $filter_handler
        ->getCacheContexts());
    }
  }
  return $contexts;
}