QueryConditionTrait::isNull

public QueryConditionTrait::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/QueryConditionTrait.php, line 34

Class

QueryConditionTrait

Provides an implementation of ConditionInterface.

Namespace

Drupal\Core\Database\Query

Code

public function isNull($field) {
  $this->condition->isNull($field);
  return $this;
}