public function WebformBubbleableMetadata::appendTo in Webform 6.x
Same name and namespace in other branches
- 8.5 src/Cache/WebformBubbleableMetadata.php \Drupal\webform\Cache\WebformBubbleableMetadata::appendTo()
Appends the values of this bubbleable metadata object to a render array.
We can't use \Drupal\Core\Render\BubbleableMetadata::applyTo because it replaces all existing cache contexts and tags.
Parameters
array $build: A render array
See also
\Drupal\Core\Render\BubbleableMetadata::applyTo
\Drupal\webform\WebformSubmissionForm::buildForm
\Drupal\webform\Plugin\WebformElementBase::replaceTokens
File
- src/
Cache/ WebformBubbleableMetadata.php, line 26
Class
- WebformBubbleableMetadata
- Value object used for bubbleable rendering metadata for webforms.
Namespace
Drupal\webform\CacheCode
public function appendTo(array &$build) {
$contexts = $this
->getCacheContexts();
$tags = $this
->getCacheTags();
$max_age = $this
->getCacheMaxAge();
$attachments = $this
->getAttachments();
// Make sure cache metadata has been set.
if (empty($contexts) && empty($tags) && empty($attachments) && $max_age === Cache::PERMANENT) {
return;
}
// The below code is copied from Renderer::mergeBubbleableMetadata.
// @see \Drupal\Core\Render\Renderer::mergeBubbleableMetadata
$meta_a = BubbleableMetadata::createFromRenderArray($build);
$meta_b = BubbleableMetadata::createFromRenderArray([
'#cache' => [
'contexts' => $contexts,
'tags' => $tags,
'max-age' => $max_age,
'attachments' => $attachments,
],
]);
$meta_a
->merge($meta_b)
->applyTo($build);
}