public static ManagedFile::uploadAjaxCallback(&$form, FormStateInterface &$form_state, Request $request)
#ajax callback for managed_file upload forms.
This ajax callback takes care of the following things:
- Ensures that broken requests due to too big files are caught.
- Adds a class to the response to be able to highlight in the UI, that a new file got uploaded.
Parameters
array $form: The build form.
\Drupal\Core\Form\FormStateInterface $form_state: The form state.
\Symfony\Component\HttpFoundation\Request $request: The current request.
Return value
\Drupal\Core\Ajax\AjaxResponse The ajax response of the ajax upload.
File
- core/modules/file/src/Element/ManagedFile.php, line 171
Class
- ManagedFile
- Provides an AJAX/progress aware widget for uploading and saving a file.
Namespace
Drupal\file\Element
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | public static function uploadAjaxCallback(&$form, FormStateInterface &$form_state, Request $request) { /** @var \Drupal\Core\Render\RendererInterface $renderer */ $renderer = \Drupal::service('renderer'); $form_parents = explode('/', $request->query->get('element_parents')); // Retrieve the element to be rendered. $form = NestedArray::getValue($form, $form_parents); // Add the special AJAX class if a new file was added. $current_file_count = $form_state->get('file_upload_delta_initial'); if (isset($form['#file_upload_delta']) && $current_file_count < $form['#file_upload_delta']) { $form[$current_file_count]['#attributes']['class'][] = 'ajax-new-content'; } // Otherwise just add the new content class on a placeholder. else { $form['#suffix'] .= '<span class="ajax-new-content"></span>'; } $status_messages = ['#type' => 'status_messages']; $form['#prefix'] .= $renderer->renderRoot($status_messages); $output = $renderer->renderRoot($form); $response = new AjaxResponse(); $response->setAttachments($form['#attached']); return $response->addCommand(new ReplaceCommand(NULL, $output));} |
Please login to continue.