class Callback in Drupal 8

Passes the source value to a callback.

The callback process plugin allows simple processing of the value, such as strtolower(). The callable takes the source value as the single mandatory argument. No additional arguments can be passed to the callback.

Available configuration keys:

• callable: The name of the callable method.

Examples:

process:
  destination_field:
    plugin: callback
    callable: strtolower
    source: source_field

An example where the callable is a static method in a class:

process:
  destination_field:
    plugin: callback
    callable:
      - '\Drupal\Component\Utility\Unicode'
      - strtolower
    source: source_field

Plugin annotation

@MigrateProcessPlugin(
  id = "callback"
)

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\Callback

See also

\Drupal\migrate\Plugin\MigrateProcessInterface

1 file declares its use of Callback

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

3 string references to 'Callback'

ConstraintManager::registerDefinitions in core/lib/Drupal/Core/Validation/ConstraintManager.php

Callback for registering definitions for constraints shipped with Symfony.

RecursiveContextualValidatorTest::setupTypedData in core/tests/Drupal/Tests/Core/TypedData/RecursiveContextualValidatorTest.php

Setups a typed data object used for test purposes.

RecursiveContextualValidatorTest::testBasicValidateWithConstraint in core/tests/Drupal/Tests/Core/TypedData/RecursiveContextualValidatorTest.php

@covers ::validate

File

core/modules/migrate/src/Plugin/migrate/process/Callback.php, line 47

Namespace

Drupal\migrate\Plugin\migrate\process

class Callback extends ProcessPluginBase {

  /**
   * {@inheritdoc}
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition) {
    if (!isset($configuration['callable'])) {
      throw new \InvalidArgumentException('The "callable" must be set.');
    }
    elseif (!is_callable($configuration['callable'])) {
      throw new \InvalidArgumentException('The "callable" must be a valid function or method.');
    }
    parent::__construct($configuration, $plugin_id, $plugin_definition);
  }

  /**
   * {@inheritdoc}
   */
  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
    return call_user_func($this->configuration['callable'], $value);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
Callback::transform	public	function	Performs the associated process. Overrides ProcessPluginBase::transform
Callback::__construct	public	function	Constructs a \Drupal\Component\Plugin\PluginBase object. Overrides PluginBase::__construct
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$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	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
ProcessPluginBase::multiple	public	function	Indicates whether the returned value requires multiple handling. Overrides MigrateProcessInterface::multiple	3
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
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.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.