/**
* Removes a field from a search index.
*
* @param \Drupal\search_api\IndexInterface $search_api_index
* The search index.
* @param string $field_id
* The ID of the field to remove.
*
* @return \Symfony\Component\HttpFoundation\Response
* The response to send to the browser.
*
* @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
* Thrown when the field was not found.
*/
public function removeField(IndexInterface $search_api_index, $field_id)
{
$fields = $search_api_index->getFields();
if (isset($fields[$field_id])) {
try {
$search_api_index->removeField($field_id);
$search_api_index->save();
} catch (SearchApiException $e) {
$args['%field'] = $fields[$field_id]->getLabel();
drupal_set_message($this->t('The field %field is locked and cannot be removed.', $args), 'error');
}
} else {
throw new NotFoundHttpException();
}
// Redirect to the index's "View" page.
$url = $search_api_index->toUrl('fields');
return $this->redirect($url->getRouteName(), $url->getRouteParameters());
}
