public function ConditionAggregate::exists in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Entity/Query/Sql/ConditionAggregate.php \Drupal\Core\Entity\Query\Sql\ConditionAggregate::exists()

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\Sql

Code

public function exists($field, $function, $langcode = NULL) {
  return $this
    ->condition($field, $function, NULL, 'IS NOT NULL', $langcode);
}