NodeReference.php

<?php

namespace Drupal\migrate_drupal\Plugin\migrate\field\d7;

use Drupal\migrate_drupal\Attribute\MigrateField;
use Drupal\migrate_drupal\Plugin\migrate\field\ReferenceBase;

/**
 * MigrateField plugin for Drupal 7 node_reference fields.
 */
class NodeReference extends ReferenceBase {
    
    /**
     * The plugin ID for the reference type migration.
     *
     * @var string
     */
    protected $nodeTypeMigration = 'd7_node_type';
    
    /**
     * {@inheritdoc}
     */
    protected function getEntityTypeMigrationId() {
        return $this->nodeTypeMigration;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function entityId() {
        return 'nid';
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFieldFormatterMap() {
        return [
            'node_reference_default' => 'entity_reference_label',
            'node_reference_plain' => 'entity_reference_label',
            'node_reference_nid' => 'entity_reference_entity_id',
            'node_reference_node' => 'entity_reference_entity_view',
            'node_reference_path' => 'entity_reference_label',
        ];
    }

}