function FieldDefinitionInterface::isRequired

Returns whether the field can be empty.

If a field is required, an entity needs to have at least a valid, non-empty item in that field's FieldItemList in order to pass validation.

An item is considered empty if its isEmpty() method returns TRUE. Typically, that is if at least one of its required properties is empty.

Return value

bool TRUE if the field is required.

Overrides DataDefinitionInterface::isRequired

See also

\Drupal\Core\TypedData\Plugin\DataType\ItemList::isEmpty()

\Drupal\Core\Field\FieldItemInterface::isEmpty()

\Drupal\Core\TypedData\DataDefinitionInterface:isRequired()

\Drupal\Core\TypedData\TypedDataManager::getDefaultConstraints()

1 method overrides FieldDefinitionInterface::isRequired()

FieldConfigBase::isRequired in core/lib/Drupal/Core/Field/FieldConfigBase.php

Returns whether the field can be empty.

File

core/lib/Drupal/Core/Field/FieldDefinitionInterface.php, line 177

Class

FieldDefinitionInterface

Defines an interface for entity field definitions.

Namespace

Drupal\Core\Field

Code

public function isRequired();