public function ConditionAggregate::exists
public ConditionAggregate::exists($field, $function, $langcode = NULL)
Queries for the existence of a field.
Parameters
$field:
string $langcode:
Return value
ConditionInterface
Overrides ConditionAggregateInterface::exists
See also
\Drupal\Core\Entity\Query\QueryInterface::exists()
File
- core/lib/Drupal/Core/Entity/Query/Sql/ConditionAggregate.php, line 50
Class
- ConditionAggregate
- Defines the aggregate condition for sql based storage.
Namespace
Drupal\Core\Entity\Query\SqlCode
public function exists($field, $function, $langcode = NULL) { return $this->condition($field, $function, NULL, 'IS NOT NULL', $langcode); }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Entity!Query!Sql!ConditionAggregate.php/function/ConditionAggregate::exists/8.1.x