Condition::isNull

public Condition::isNull($field)

Sets a condition that the specified field be NULL.

Parameters

$field: The name of the field to check.

Return value

\Drupal\Core\Database\Query\ConditionInterface The called object.

Overrides ConditionInterface::isNull

File

core/lib/Drupal/Core/Database/Query/Condition.php, line 102

Class

Condition

Generic class for a series of conditions in a query.

Namespace

Drupal\Core\Database\Query

Code

public function isNull($field) {
  return $this->condition($field, NULL, 'IS NULL');
}