class MakeUniqueEntityField in Drupal 8

Ensures the source value is made unique against an entity field.

The make_unique process plugin is typically used to make the entity id unique, ensuring that migrated entity data is preserved.

The make_unique process plugin has two required configuration keys, entity_type and field. It's typically used with an entity destination, making sure that after saving the entity, the field value is unique. For example, if the value is foo and there is already an entity where the field value is foo, then the plugin will return foo1.

The optional configuration key postfix which will be added between the number and the original value, for example, foo_1 for postfix: _. Note that the value of postfix is ignored if the value is not changed, if it was already unique.

The optional configuration key migrated, if true, indicates that an entity will only be considered a duplicate if it was migrated by the current migration.

Available configuration keys

• entity_type: The entity type.
• field: The entity field for the given value.
• migrated: (optional) A boolean to indicate that making the field unique only occurs for migrated entities.
• start: (optional) The position at which to start reading.
• length: (optional) The number of characters to read.
• postfix: (optional) A string to insert before the numeric postfix.

Examples:

process:
  format:
  -
    plugin: machine_name
    source: name
  -
    plugin: make_unique_entity_field
    entity_type: filter_format
    field: format

This will create a format machine name out the human readable name and make sure it's unique.

process:
  format:
  -
    plugin: machine_name
    source: name
  -
    plugin: make_unique_entity_field
    entity_type: filter_format
    field: format
    postfix: _
    migrated: true

This will create a format machine name out the human readable name and make sure it's unique if the entity was migrated. The postfix character is inserted between the added number and the original value.

Plugin annotation

@MigrateProcessPlugin(
  id = "make_unique_entity_field"
)

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\MakeUniqueBase
        • class \Drupal\migrate\Plugin\migrate\process\MakeUniqueEntityField implements ContainerFactoryPluginInterface

See also

\Drupal\migrate\Plugin\migrate\process\MakeUniqueBase

\Drupal\migrate\Plugin\MigrateProcessInterface

1 file declares its use of MakeUniqueEntityField

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

File

core/modules/migrate/src/Plugin/migrate/process/MakeUniqueEntityField.php, line 84

Namespace

Drupal\migrate\Plugin\migrate\process

class MakeUniqueEntityField extends MakeUniqueBase implements ContainerFactoryPluginInterface {

  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;

  /**
   * The current migration.
   *
   * @var \Drupal\migrate\Plugin\MigrationInterface
   */
  protected $migration;

  /**
   * {@inheritdoc}
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration, EntityTypeManagerInterface $entity_type_manager) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->migration = $migration;
    $this->entityTypeManager = $entity_type_manager;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
    return new static($configuration, $plugin_id, $plugin_definition, $migration, $container
      ->get('entity_type.manager'));
  }

  /**
   * {@inheritdoc}
   */
  protected function exists($value) {

    // Plugins are cached so for every run we need a new query object.
    $query = $this->entityTypeManager
      ->getStorage($this->configuration['entity_type'])
      ->getQuery()
      ->condition($this->configuration['field'], $value);
    if (!empty($this->configuration['migrated'])) {

      // Check if each entity is in the ID map.
      $idMap = $this->migration
        ->getIdMap();
      foreach ($query
        ->execute() as $id) {
        $dest_id_values[$this->configuration['field']] = $id;
        if ($idMap
          ->lookupSourceId($dest_id_values)) {
          return TRUE;
        }
      }
      return FALSE;
    }
    else {

      // Just check if any such entity exists.
      return $query
        ->count()
        ->execute();
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
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
MakeUniqueBase::transform	public	function	Creates a unique value based on the source value. Overrides ProcessPluginBase::transform
MakeUniqueEntityField::$entityTypeManager	protected	property	The entity type manager.
MakeUniqueEntityField::$migration	protected	property	The current migration.
MakeUniqueEntityField::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create
MakeUniqueEntityField::exists	protected	function	This is a query checking the existence of some value. Overrides MakeUniqueBase::exists
MakeUniqueEntityField::__construct	public	function	Constructs a \Drupal\Component\Plugin\PluginBase object. Overrides PluginBase::__construct
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.