class QueryArgsCacheContext

Same name in other branches
  1. 9 core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php \Drupal\Core\Cache\Context\QueryArgsCacheContext
  2. 8.9.x core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php \Drupal\Core\Cache\Context\QueryArgsCacheContext
  3. 11.x core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php \Drupal\Core\Cache\Context\QueryArgsCacheContext

Defines the QueryArgsCacheContext service, for "per query args" caching.

Cache context ID: 'url.query_args' (to vary by all query arguments). Calculated cache context ID: 'url.query_args:%key', e.g.'url.query_args:foo' (to vary by the 'foo' query argument).

Hierarchy

Expanded class hierarchy of QueryArgsCacheContext

1 file declares its use of QueryArgsCacheContext
QueryArgsCacheContextTest.php in core/tests/Drupal/Tests/Core/Cache/Context/QueryArgsCacheContextTest.php
1 string reference to 'QueryArgsCacheContext'
core.services.yml in core/core.services.yml
core/core.services.yml
1 service uses QueryArgsCacheContext
cache_context.url.query_args in core/core.services.yml
Drupal\Core\Cache\Context\QueryArgsCacheContext

File

core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php, line 14

Namespace

Drupal\Core\Cache\Context
View source 
class QueryArgsCacheContext extends RequestStackCacheContextBase implements CalculatedCacheContextInterface {
    
    /**
     * {@inheritdoc}
     */
    public static function getLabel() {
        return t('Query arguments');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getContext($query_arg = NULL) {
        if ($query_arg === NULL) {
            // All arguments requested. Use normalized query string to minimize
            // variations.
            $value = $this->requestStack
                ->getCurrentRequest()
                ->getQueryString();
            return $value !== NULL ? $value : '';
        }
        elseif ($this->requestStack
            ->getCurrentRequest()->query
            ->has($query_arg)) {
            $value = $this->requestStack
                ->getCurrentRequest()->query
                ->all()[$query_arg];
            if (is_array($value)) {
                return http_build_query($value);
            }
            elseif ($value !== '') {
                return $value;
            }
            return '?valueless?';
        }
        return '';
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheableMetadata($query_arg = NULL) {
        return new CacheableMetadata();
    }

}

Members

Title Modifiers Object type Summary Overriden Title
QueryArgsCacheContext::getCacheableMetadata public function Gets the cacheability metadata for the context based on the parameter value. Overrides CalculatedCacheContextInterface::getCacheableMetadata
QueryArgsCacheContext::getContext public function Returns the string representation of the cache context. Overrides CalculatedCacheContextInterface::getContext
QueryArgsCacheContext::getLabel public static function Returns the label of the cache context. Overrides CalculatedCacheContextInterface::getLabel
RequestStackCacheContextBase::$requestStack protected property The request stack.
RequestStackCacheContextBase::__construct public function Constructs a new RequestStackCacheContextBase class.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.