public RenderCache::getCacheableRenderArray(array $elements)
Gets a cacheable render array for a render array and its rendered output.
Given a render array and its rendered output (HTML string), return an array data structure that allows the render array and its associated metadata to be cached reliably (and is serialization-safe).
If Drupal needs additional rendering metadata to be cached at some point, consumers of this method will continue to work. Those who only cache certain parts of a render array will cease to work.
Parameters
array $elements: A render array, on which \Drupal\Core\Render\RendererInterface::render() has already been invoked.
Return value
array An array representing the cacheable data for this render array.
Overrides RenderCacheInterface::getCacheableRenderArray
File
- core/lib/Drupal/Core/Render/RenderCache.php, line 321
Class
- RenderCache
- Wraps the caching logic for the render caching system.
Namespace
Drupal\Core\Render
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | public function getCacheableRenderArray(array $elements) { $data = [ '#markup' => $elements['#markup'], '#attached' => $elements['#attached'], '#cache' => [ 'contexts' => $elements['#cache']['contexts'], 'tags' => $elements['#cache']['tags'], 'max-age' => $elements['#cache']['max-age'], ], ]; // Preserve cacheable items if specified. If we are preserving any cacheable // children of the element, we assume we are only interested in their // individual markup and not the parent's one, thus we empty it to minimize // the cache entry size. if (!empty($elements['#cache_properties']) && is_array($elements['#cache_properties'])) { $data['#cache_properties'] = $elements['#cache_properties']; // Extract all the cacheable items from the element using cache // properties. $cacheable_items = array_intersect_key($elements, array_flip($elements['#cache_properties'])); $cacheable_children = Element::children($cacheable_items); if ($cacheable_children) { $data['#markup'] = ''; // Cache only cacheable children's markup. foreach ($cacheable_children as $key) { // We can assume that #markup is safe at this point. $cacheable_items[$key] = ['#markup' => Markup::create($cacheable_items[$key]['#markup'])]; } } $data += $cacheable_items; } $data['#markup'] = Markup::create($data['#markup']); return $data;} |
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