Queries for the existence of a field.

Parameters

string $field: The field to query for existence.

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

Return value

$this

Overrides ConditionInterface::exists

File

core/lib/Drupal/Core/Entity/Query/Sql/Condition.php, line 86

Class

Condition

Implements entity query conditions for SQL databases.

Namespace

Drupal\Core\Entity\Query\Sql

Code

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

---