class DefaultValue in Drupal 10

Returns a given default value if the input is empty.

The default_value process plugin provides the ability to set a fixed default value. The plugin returns a default value if the input value is considered empty (NULL, FALSE, 0, '0', an empty string, or an empty array). The strict configuration key can be used to set the default only when the incoming value is NULL.

Available configuration keys:

• default_value: The fixed default value to apply.
• strict: (optional) Use strict value checking. Defaults to false.
  • FALSE: Apply default when input value is empty().
  • TRUE: Apply default when input value is NULL.

Example:

process:
  uid:
    -
      plugin: migration_lookup
      migration: users
      source: author
      no_stub: true
    -
      plugin: default_value
      default_value: 44

This will look up the source value of author in the users migration and if not found, set the destination property uid to 44.

Plugin annotation

@MigrateProcessPlugin(
  id = "default_value",
  handle_multiples = TRUE
)

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
    • class \Drupal\migrate\ProcessPluginBase implements MigrateProcessInterface
      • class \Drupal\migrate\Plugin\migrate\process\DefaultValue

See also

\Drupal\migrate\Plugin\MigrateProcessInterface

1 file declares its use of DefaultValue

DefaultValueTest.php in core/modules/migrate/tests/src/Unit/process/DefaultValueTest.php

File

core/modules/migrate/src/Plugin/migrate/process/DefaultValue.php, line 49

Namespace

Drupal\migrate\Plugin\migrate\process

class DefaultValue extends ProcessPluginBase {

  /**
   * {@inheritdoc}
   */
  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
    if (!empty($this->configuration['strict'])) {
      return $value ?? $this->configuration['default_value'];
    }
    return $value ?: $this->configuration['default_value'];
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DefaultValue::transform	public	function	Performs the associated process. Overrides ProcessPluginBase::transform
DependencySerializationTrait::$_entityStorages	protected	property
DependencySerializationTrait::$_serviceIds	protected	property
DependencySerializationTrait::__sleep	public	function		2
DependencySerializationTrait::__wakeup	public	function		2
MessengerTrait::$messenger	protected	property	The messenger.	18
MessengerTrait::messenger	public	function	Gets the messenger.	18
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function
PluginBase::getDerivativeId	public	function
PluginBase::getPluginDefinition	public	function		2
PluginBase::getPluginId	public	function
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::__construct	public	function	Constructs a \Drupal\Component\Plugin\PluginBase object.	53
ProcessPluginBase::multiple	public	function	Indicates whether the returned value requires multiple handling. Overrides MigrateProcessInterface::multiple	3
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	3
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	1
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.