Returns the names of the field's subproperties.

A field is a list of items, and each item can contain one or more properties. All items for a given field contain the same property names, but the values can be different for each item.

For example, an email field might just contain a single 'value' property, while a link field might contain 'title' and 'url' properties, and a text field might contain 'value', 'summary', and 'format' properties.

Return value

string[] The property names.

Overrides FieldStorageDefinitionInterface::getPropertyNames

File

core/lib/Drupal/Core/Field/BaseFieldDefinition.php, line 598

Class

BaseFieldDefinition

A class for defining entity fields.

Namespace

Drupal\Core\Field

Code

public function getPropertyNames() {
  return array_keys($this->getPropertyDefinitions());
}

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