ViewsRenderedSelection.php

<?php

namespace Drupal\views_selection_rendered_widget\Plugin\EntityReferenceSelection;

use Drupal\views\Plugin\EntityReferenceSelection\ViewsSelection;


/**
 * Plugin implementation of the 'selection' entity_reference.
 *
 * @EntityReferenceSelection(
 *   id = "views_rendered",
 *   label = @Translation("Views: Filter by an entity reference view and display rendered fields"),
 *   group = "views_rendered",
 *   weight = 1
 * )
 */
class ViewsRenderedSelection extends ViewsSelection {

  /**
   * {@inheritdoc}
   */
  public function getReferenceableEntities($match = NULL, $match_operator = 'CONTAINS', $limit = 0) {
    $display_name = $this->getConfiguration()['view']['display_name'];
    $arguments = $this->getConfiguration()['view']['arguments'];
    $result = [];
    if ($this->initializeView($match, $match_operator, $limit)) {
      // Get the results.
      $result = $this->view->executeDisplay($display_name, $arguments);
    }


    $return = [];
    if ($result) {
      foreach ($this->view->result as $row) {
        $entity = $row->_entity;
        $return[$entity->bundle()][$entity->id()] = render($this->view->rowPlugin->render($row));
      }
    }
    return $return;
  }

}