FieldItemDataDefinition::getMainPropertyName

public FieldItemDataDefinition::getMainPropertyName()

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.

Overrides ComplexDataDefinitionInterface::getMainPropertyName

File

core/lib/Drupal/Core/Field/TypedData/FieldItemDataDefinition.php, line 72

Class

FieldItemDataDefinition

A typed data definition class for defining field items.

Namespace

Drupal\Core\Field\TypedData

Code

public function getMainPropertyName() {
  return $this->fieldDefinition->getFieldStorageDefinition()->getMainPropertyName();
}