/**
 * Implements hook_node_search_result().
 */
function {{ machine_name }}_node_search_result(\Drupal\node\NodeInterface $node) {
  $rating = db_query('SELECT SUM(points) FROM {my_rating} WHERE nid = :nid', ['nid' => $node->id()])->fetchField();
  return ['rating' => \Drupal::translation()->formatPlural($rating, '1 point', '@count points')];
}