public static function FieldItemInterface::mainPropertyName

public static FieldItemInterface::mainPropertyName()

Returns the name of the main property, if any.

Some field items consist mainly of one main property, e.g. the value of a text field or the

target_id 

of an entity reference. If the field item has no main property, the method returns NULL.

Return value

string|null The name of the value property, or NULL if there is none.

See also

\Drupal\Core\Field\BaseFieldDefinition

File

core/lib/Drupal/Core/Field/FieldItemInterface.php, line 49

Class

FieldItemInterface

Interface for entity field items.

Namespace

Drupal\Core\Field

Code

public static function mainPropertyName();