class EntityReferenceSelectionHandlerGeneric_comment

entityreference_autoload_info in core/modules/entityreference/entityreference.module

Implements hook_autoload_info().

class EntityReferenceSelectionHandlerGeneric_comment extends EntityReferenceSelectionHandlerGeneric {

  protected $label_key = 'subject';

  public function entityFieldQueryAlter(SelectQueryInterface $query) {
    // Adding the 'comment_access' tag is insufficient for comments: need to
    // also know about the concept of 'published' and 'unpublished'.
    if (!user_access('administer comments')) {
      $base_table = $this->ensureBaseTable($query);
      $query->condition("$base_table.status", COMMENT_PUBLISHED);
    }

    // Need to make sure that comments cannot be viewed when the user doesn't
    // have access to the node.
    $tables = $query->getTables();
    $base_table = key($tables);
    $node_alias = $query->innerJoin('node', 'n', '%alias.nid = ' . $base_table . '.nid');
    // Pass the query to the node access control.
    $this->reAlterQuery($query, 'node_access', $node_alias);

    // The comment entity exposes a bundle, but doesn't have a bundle column
    // in the database. Alter the query to fetch the bundle.
    $conditions = &$query->conditions();
    foreach ($conditions as $key => &$condition) {
      if ($key !== '#conjunction' && is_string($condition['field']) && $condition['field'] === $base_table . '.node_type') {
        $condition['field'] = '`' . $node_alias . '`.`type`';
        foreach ($condition['value'] as &$value) {
          if (substr($value, 0, 13) == 'comment_node_') {
            $value = substr($value, 13);
          }
        }
        break;
      }
    }

    // @see EntityReferenceHandler_node::entityFieldQueryAlter()
    if (!user_access('bypass node access') && !count(module_implements('node_grants'))) {
      $query->condition($node_alias . '.status', 1);
    }
  }
}