public function MigrationLookup::transform in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/migrate/src/Plugin/migrate/process/MigrationLookup.php \Drupal\migrate\Plugin\migrate\process\MigrationLookup::transform()
2. 10 core/modules/migrate/src/Plugin/migrate/process/MigrationLookup.php \Drupal\migrate\Plugin\migrate\process\MigrationLookup::transform()

Throws

\Drupal\migrate\MigrateSkipProcessException

\Drupal\migrate\MigrateException

Overrides ProcessPluginBase::transform

File

core/modules/migrate/src/Plugin/migrate/process/MigrationLookup.php, line 185

Class

MigrationLookup

Looks up the value of a property based on a previous migration.

Namespace

Drupal\migrate\Plugin\migrate\process

Code

public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
  $lookup_migration_ids = (array) $this->configuration['migration'];
  $self = FALSE;
  $destination_ids = NULL;
  $source_id_values = [];
  foreach ($lookup_migration_ids as $lookup_migration_id) {
    if ($lookup_migration_id == $this->migration
      ->id()) {
      $self = TRUE;
    }
    if (isset($this->configuration['source_ids'][$lookup_migration_id])) {
      $value = array_values($row
        ->getMultiple($this->configuration['source_ids'][$lookup_migration_id]));
    }
    if (!is_array($value)) {
      $value = [
        $value,
      ];
    }
    $this
      ->skipInvalid($value);
    $source_id_values[$lookup_migration_id] = $value;

    // Re-throw any PluginException as a MigrateException so the executable
    // can shut down the migration.
    try {
      $destination_id_array = $this->migrateLookup
        ->lookup($lookup_migration_id, $value);
    } catch (PluginNotFoundException $e) {
      $destination_id_array = [];
    } catch (MigrateException $e) {
      throw $e;
    } catch (\Exception $e) {
      throw new MigrateException(sprintf('A %s was thrown while processing this migration lookup', gettype($e)), $e
        ->getCode(), $e);
    }
    if ($destination_id_array) {
      $destination_ids = array_values(reset($destination_id_array));
      break;
    }
  }
  if (!$destination_ids && !empty($this->configuration['no_stub'])) {
    return NULL;
  }
  if (!$destination_ids && ($self || isset($this->configuration['stub_id']) || count($lookup_migration_ids) == 1)) {

    // If the lookup didn't succeed, figure out which migration will do the
    // stubbing.
    if ($self) {
      $stub_migration = $this->migration
        ->id();
    }
    elseif (isset($this->configuration['stub_id'])) {
      $stub_migration = $this->configuration['stub_id'];
    }
    else {
      $stub_migration = reset($lookup_migration_ids);
    }

    // Rethrow any exception as a MigrateException so the executable can shut
    // down the migration.
    try {
      $destination_ids = $this->migrateStub
        ->createStub($stub_migration, $source_id_values[$stub_migration], [], FALSE);
    } catch (\LogicException $e) {

      // For BC reasons, we must allow attempting to stub a derived migration.
    } catch (PluginNotFoundException $e) {

      // For BC reasons, we must allow attempting to stub a non-existent
      // migration.
    } catch (MigrateException $e) {
      throw $e;
    } catch (MigrateSkipRowException $e) {
      throw $e;
    } catch (\Exception $e) {
      throw new MigrateException(sprintf('A(n) %s was thrown while attempting to stub.', gettype($e)), $e
        ->getCode(), $e);
    }
  }
  if ($destination_ids) {
    if (count($destination_ids) == 1) {
      return reset($destination_ids);
    }
    else {
      return $destination_ids;
    }
  }
}