Queries for the existence of a field.

Parameters

string $field: The field to query for existence.

string $function: The function.

string $langcode: (optional) For which language the entity should be prepared, defaults to the current content language.

Return value

\Drupal\Core\Entity\Query\ConditionInterface

Overrides ConditionAggregateInterface::exists

File

core/lib/Drupal/Core/Entity/Query/Sql/ConditionAggregate.php, line 57

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);
}

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