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Title Object type File name Summary
ArrayElement::isNullable function core/lib/Drupal/Core/Config/Schema/ArrayElement.php Determines if this element allows NULL as a value.
Condition::isNull function core/lib/Drupal/Core/Database/Query/Condition.php Sets a condition that the specified field be NULL.
ConditionInterface::isNull function core/lib/Drupal/Core/Database/Query/ConditionInterface.php Sets a condition that the specified field be NULL.
IsNullConstraint class core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraint.php Null constraint.
IsNullConstraint.php file core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraint.php
IsNullConstraintValidator class core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraintValidator.php Null constraint validator.
IsNullConstraintValidator.php file core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraintValidator.php
IsNullConstraintValidator::validate function core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/IsNullConstraintValidator.php
QueryConditionTrait::isNull function core/lib/Drupal/Core/Database/Query/QueryConditionTrait.php
Select::havingIsNull function core/lib/Drupal/Core/Database/Query/Select.php Sets a condition in the HAVING clause that the specified field be NULL.
SelectExtender::havingIsNull function core/lib/Drupal/Core/Database/Query/SelectExtender.php Sets a condition in the HAVING clause that the specified field be NULL.
SelectExtender::isNull function core/lib/Drupal/Core/Database/Query/SelectExtender.php Sets a condition that the specified field be NULL.
SelectInterface::havingIsNull function core/lib/Drupal/Core/Database/Query/SelectInterface.php Sets a condition in the HAVING clause that the specified field be NULL.
SelectTest::testIsNullCondition function core/tests/Drupal/KernelTests/Core/Database/SelectTest.php Tests that we can find a record with a NULL value.

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