Same name in this branch
  1. 10 core/modules/migrate/src/Plugin/migrate/source/EmptySource.php \Drupal\migrate\Plugin\migrate\source\EmptySource
  2. 10 core/modules/migrate_drupal/src/Plugin/migrate/source/EmptySource.php \Drupal\migrate_drupal\Plugin\migrate\source\EmptySource
Same name and namespace in other branches
  1. 8.9.x core/modules/migrate/src/Plugin/migrate/source/EmptySource.php \Drupal\migrate\Plugin\migrate\source\EmptySource
  2. 9 core/modules/migrate/src/Plugin/migrate/source/EmptySource.php \Drupal\migrate\Plugin\migrate\source\EmptySource

Source returning a row based on the constants provided.

Example:


source:
  plugin: empty
  constants:
    entity_type: user
    field_name: image

This will return a single row containing 'constants/entity_type' and 'constants/field_name' elements, with values of 'user' and 'image', respectively.

For additional configuration keys, refer to the parent class:

Plugin annotation


@MigrateSource(
  id = "empty",
  source_module = "migrate"
)

Hierarchy

Expanded class hierarchy of EmptySource

See also

\Drupal\migrate\Plugin\migrate\source\SourcePluginBase

1 file declares its use of EmptySource
EmptySource.php in core/modules/migrate_drupal/src/Plugin/migrate/source/EmptySource.php

File

core/modules/migrate/src/Plugin/migrate/source/EmptySource.php, line 30

Namespace

Drupal\migrate\Plugin\migrate\source
View source
class EmptySource extends SourcePluginBase {

  /**
   * {@inheritdoc}
   */
  public function fields() {
    return [
      'id' => $this
        ->t('ID'),
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function initializeIterator() {
    return new \ArrayIterator([
      [
        'id' => '',
      ],
    ]);
  }

  /**
   * Allows class to decide how it will react when it is treated like a string.
   */
  public function __toString() {
    return '';
  }

  /**
   * {@inheritdoc}
   */
  public function getIds() {
    $ids['id']['type'] = 'string';
    return $ids;
  }

  /**
   * {@inheritdoc}
   */
  protected function doCount() {
    return 1;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
DependencySerializationTrait::$_entityStorages protected property
DependencySerializationTrait::$_serviceIds protected property
DependencySerializationTrait::__sleep public function 2
DependencySerializationTrait::__wakeup public function 2
EmptySource::doCount protected function Gets the source count checking if the source is countable or using the iterator_count function. Overrides SourcePluginBase::doCount
EmptySource::fields public function Returns available fields on the source. Overrides MigrateSourceInterface::fields
EmptySource::getIds public function Defines the source fields uniquely identifying a source row. Overrides MigrateSourceInterface::getIds
EmptySource::initializeIterator public function Initializes the iterator with the source data. Overrides SourcePluginBase::initializeIterator
EmptySource::__toString public function Allows class to decide how it will react when it is treated like a string. Overrides MigrateSourceInterface::__toString
MessengerTrait::$messenger protected property The messenger. 10
MessengerTrait::messenger public function Gets the messenger. 10
MessengerTrait::setMessenger public function Sets the messenger.
MigrateSourceInterface::NOT_COUNTABLE constant Indicates that the source is not countable.
PluginBase::$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 2
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.
SourcePluginBase::$cache protected property The backend cache.
SourcePluginBase::$cacheCounts protected property Whether this instance should cache the source count. 1
SourcePluginBase::$cacheKey protected property Key to use for caching counts.
SourcePluginBase::$currentRow protected property The current row from the query.
SourcePluginBase::$currentSourceIds protected property The primary key of the current row.
SourcePluginBase::$highWaterProperty protected property Information on the property used as the high-water mark.
SourcePluginBase::$highWaterStorage protected property The key-value storage for the high-water value.
SourcePluginBase::$idMap protected property The migration ID map.
SourcePluginBase::$iterator protected property The iterator to iterate over the source rows.
SourcePluginBase::$mapRowAdded protected property Flags whether source plugin will read the map row and add to data row.
SourcePluginBase::$migration protected property The entity migration object.
SourcePluginBase::$moduleHandler protected property The module handler service. 2
SourcePluginBase::$originalHighWater protected property The high water mark at the beginning of the import operation.
SourcePluginBase::$skipCount protected property Whether this instance should not attempt to count the source. 1
SourcePluginBase::$trackChanges protected property Flags whether to track changes to incoming data. 1
SourcePluginBase::aboveHighWater protected function Check if the incoming data is newer than what we've previously imported.
SourcePluginBase::count public function 2
SourcePluginBase::current public function
SourcePluginBase::fetchNextRow protected function Position the iterator to the following row. 1
SourcePluginBase::getCache protected function Gets the cache object.
SourcePluginBase::getCurrentIds public function Gets the currentSourceIds data member.
SourcePluginBase::getHighWater protected function The current value of the high water mark.
SourcePluginBase::getHighWaterField protected function Get the name of the field used as the high watermark.
SourcePluginBase::getHighWaterProperty protected function Get information on the property used as the high watermark.
SourcePluginBase::getHighWaterStorage protected function Get the high water storage object.
SourcePluginBase::getIterator protected function Returns the iterator that will yield the row arrays to be processed.
SourcePluginBase::getModuleHandler protected function Gets the module handler.
SourcePluginBase::getSourceModule public function Gets the source module providing the source data. Overrides MigrateSourceInterface::getSourceModule
SourcePluginBase::key public function
SourcePluginBase::next public function
SourcePluginBase::postRollback public function Performs post-rollback tasks. Overrides RollbackAwareInterface::postRollback
SourcePluginBase::prepareRow public function Adds additional data to the row. Overrides MigrateSourceInterface::prepareRow 49
SourcePluginBase::preRollback public function Performs pre-rollback tasks. Overrides RollbackAwareInterface::preRollback
SourcePluginBase::rewind public function 1
SourcePluginBase::rowChanged protected function Checks if the incoming row has changed since our last import.
SourcePluginBase::saveHighWater protected function Save the new high water mark.
SourcePluginBase::valid public function
SourcePluginBase::__construct public function Constructs a \Drupal\Component\Plugin\PluginBase object. Overrides PluginBase::__construct 4
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.