diff --git a/core/includes/ajax.inc b/core/includes/ajax.inc index 8e024a8..1bced44 100644 --- a/core/includes/ajax.inc +++ b/core/includes/ajax.inc @@ -23,9 +23,9 @@ * forms, it can be used with the #ajax property. * The #ajax property can be used to bind events to the Ajax framework. By * default, #ajax uses 'system/ajax' as its path for submission and thus calls - * ajax_form_callback() and a defined #ajax['callback'] function. - * However, you may optionally specify a different path to request or a - * different callback function to invoke, which can return updated HTML or can + * \Drupal\system\FormAjaxController::content() and a defined #ajax['callback'] + * function. However, you may optionally specify a different path to request or + * a different callback function to invoke, which can return updated HTML or can * also return a richer set of * @link ajax_commands Ajax framework commands @endlink. * @@ -38,17 +38,18 @@ * that element. * - The browser submits an HTTP POST request to the 'system/ajax' Drupal * path. - * - The menu page callback for 'system/ajax', ajax_form_callback(), calls - * drupal_process_form() to process the form submission and rebuild the - * form if necessary. The form is processed in much the same way as if it - * were submitted without Ajax, with the same #process functions and - * validation and submission handlers called in either case, making it easy - * to create Ajax-enabled forms that degrade gracefully when JavaScript is - * disabled. - * - After form processing is complete, ajax_form_callback() calls the - * function named by #ajax['callback'], which returns the form element that - * has been updated and needs to be returned to the browser, or - * alternatively, an array of custom Ajax commands. + * - The controller for the route '/system/ajax', + * \Drupal\system\FormAjaxController::content(), calls drupal_process_form() + * to process the form submission and rebuild the form if necessary. The + * form is processed in much the same way as if it were submitted without + * Ajax, with the same #process functions and validation and submission + * handlers called in either case, making it easy to create Ajax-enabled + * forms that degrade gracefully when JavaScript is disabled. + * - After form processing is complete, + * \Drupal\system\FormAjaxController::content() calls the function named by + * #ajax['callback'], which returns the form element that has been updated + * and needs to be returned to the browser, or alternatively, an array of + * custom Ajax commands. * - The array is serialized using ajax_render() and sent to the browser. * - The browser unserializes the returned JSON string into an array of * command objects and executes each command, resulting in the old page @@ -125,10 +126,10 @@ * - #ajax['path']: The menu path to use for the request. This is often omitted * and the default is used. This path should map * to a menu page callback that returns data using ajax_render(). Defaults to - * 'system/ajax', which invokes ajax_form_callback(), eventually calling - * the function named in #ajax['callback']. If you use a custom - * path, you must set up the menu entry and handle the entire callback in your - * own code. + * 'system/ajax', which invokes \Drupal\system\FormAjaxController::content(), + * eventually calling the function named in #ajax['callback']. If you use a + * custom path, you must set up the menu entry and handle the entire callback + * in your own code. * - #ajax['wrapper']: The CSS ID of the area to be replaced by the content * returned by the #ajax['callback'] function. The content returned from * the callback will replace the entire element named by #ajax['wrapper']. @@ -302,88 +303,6 @@ function ajax_render($commands = array()) { } /** - * Gets a form submitted via #ajax during an Ajax callback. - * - * This will load a form from the form cache used during Ajax operations. It - * pulls the form info from $_POST. - * - * @return - * An array containing the $form and $form_state. Use the list() function - * to break these apart: - * @code - * list($form, $form_state, $form_id, $form_build_id) = ajax_get_form(); - * @endcode - */ -function ajax_get_form() { - $form_state = form_state_defaults(); - - $form_build_id = $_POST['form_build_id']; - - // Get the form from the cache. - $form = form_get_cache($form_build_id, $form_state); - if (!$form) { - // If $form cannot be loaded from the cache, the form_build_id in $_POST - // must be invalid, which means that someone performed a POST request onto - // system/ajax without actually viewing the concerned form in the browser. - // This is likely a hacking attempt as it never happens under normal - // circumstances, so we just do nothing. - watchdog('ajax', 'Invalid form POST data.', array(), WATCHDOG_WARNING); - throw new BadRequestHttpException(); - } - - // Since some of the submit handlers are run, redirects need to be disabled. - $form_state['no_redirect'] = TRUE; - - // When a form is rebuilt after Ajax processing, its #build_id and #action - // should not change. - // @see drupal_rebuild_form() - $form_state['rebuild_info']['copy']['#build_id'] = TRUE; - $form_state['rebuild_info']['copy']['#action'] = TRUE; - - // The form needs to be processed; prepare for that by setting a few internal - // variables. - $form_state['input'] = $_POST; - $form_id = $form['#form_id']; - - return array($form, $form_state, $form_id, $form_build_id); -} - -/** - * Page callback: Handles Ajax requests for the #ajax Form API property. - * - * This rebuilds the form from cache and invokes the defined #ajax['callback'] - * to return an Ajax command structure for JavaScript. In case no 'callback' has - * been defined, nothing will happen. - * - * The Form API #ajax property can be set both for buttons and other input - * elements. - * - * This function is also the canonical example of how to implement - * #ajax['path']. If processing is required that cannot be accomplished with - * a callback, re-implement this function and set #ajax['path'] to the - * enhanced function. - * - * @see system_menu() - */ -function ajax_form_callback() { - list($form, $form_state) = ajax_get_form(); - drupal_process_form($form['#form_id'], $form, $form_state); - - // We need to return the part of the form (or some other content) that needs - // to be re-rendered so the browser can update the page with changed content. - // Since this is the generic menu callback used by many Ajax elements, it is - // up to the #ajax['callback'] function of the element (may or may not be a - // button) that triggered the Ajax request to determine what needs to be - // rendered. - if (!empty($form_state['triggering_element'])) { - $callback = $form_state['triggering_element']['#ajax']['callback']; - } - if (!empty($callback) && is_callable($callback)) { - return call_user_func_array($callback, array(&$form, &$form_state)); - } -} - -/** * Theme callback: Returns the correct theme for an Ajax request. * * Many different pages can invoke an Ajax request to system/ajax or another diff --git a/core/includes/form.inc b/core/includes/form.inc index 5abf669..ba22c78 100644 --- a/core/includes/form.inc +++ b/core/includes/form.inc @@ -471,8 +471,9 @@ function form_state_defaults() { * workflow, to be returned for rendering. * * Ajax form submissions are almost always multi-step workflows, so that is one - * common use-case during which form rebuilding occurs. See ajax_form_callback() - * for more information about creating Ajax-enabled forms. + * common use-case during which form rebuilding occurs. See + * Drupal\system\FormAjaxController::content() for more information about + * creating Ajax-enabled forms. * * @param $form_id * The unique string identifying the desired form. If a function @@ -496,7 +497,7 @@ function form_state_defaults() { * The newly built form. * * @see drupal_process_form() - * @see ajax_form_callback() + * @see \Drupal\system\FormAjaxController::content() */ function drupal_rebuild_form($form_id, &$form_state, $old_form = NULL) { $form = drupal_retrieve_form($form_id, $form_state); @@ -1292,9 +1293,10 @@ function drupal_validate_form($form_id, &$form, &$form_state) { * - If $form_state['rebuild'] is TRUE, the form is being rebuilt, and no * redirection is done. * - If $form_state['no_redirect'] is TRUE, redirection is disabled. This is - * set, for instance, by ajax_get_form() to prevent redirection in Ajax - * callbacks. $form_state['no_redirect'] should never be set or altered by - * form builder functions or form validation/submit handlers. + * set, for instance, by \Drupal\system\FormAjaxController::getForm() to + * prevent redirection in Ajax callbacks. $form_state['no_redirect'] should + * never be set or altered by form builder functions or form validation/submit + * handlers. * - If $form_state['redirect'] is set to FALSE, redirection is disabled. * - If none of the above conditions has prevented redirection, then the * redirect is accomplished by returning a RedirectResponse, passing in the diff --git a/core/modules/field/field.form.inc b/core/modules/field/field.form.inc index ac0cb70..84571eb 100644 --- a/core/modules/field/field.form.inc +++ b/core/modules/field/field.form.inc @@ -129,8 +129,8 @@ function field_form_element_after_build($element, &$form_state) { * This handler is run regardless of whether JS is enabled or not. It makes * changes to the form state. If the button was clicked with JS disabled, then * the page is reloaded with the complete rebuilt form. If the button was - * clicked with JS enabled, then ajax_form_callback() calls field_add_more_js() - * to return just the changed part of the form. + * clicked with JS enabled, then Drupal\system\FormAjaxController::content() + * calls field_add_more_js() to return just the changed part of the form. */ function field_add_more_submit($form, &$form_state) { $button = $form_state['triggering_element']; diff --git a/core/modules/file/file.field.inc b/core/modules/file/file.field.inc index 7e693c7..d3dc0a0 100644 --- a/core/modules/file/file.field.inc +++ b/core/modules/file/file.field.inc @@ -428,12 +428,19 @@ function file_field_widget_process($element, &$form_state, $form) { // file, the entire group of file fields is updated together. if ($element['#cardinality'] != 1) { $parents = array_slice($element['#array_parents'], 0, -1); - $new_path = 'file/ajax/' . implode('/', $parents) . '/' . $form['form_build_id']['#value']; + $new_path = 'file/ajax'; + $new_options = array( + 'query' => array( + 'element_parents' => implode('/', $parents), + 'form_build_id' => $form['form_build_id']['#value'], + ), + ); $field_element = NestedArray::getValue($form, $parents); $new_wrapper = $field_element['#id'] . '-ajax-wrapper'; foreach (element_children($element) as $key) { if (isset($element[$key]['#ajax'])) { $element[$key]['#ajax']['path'] = $new_path; + $element[$key]['#ajax']['options'] = $new_options; $element[$key]['#ajax']['wrapper'] = $new_wrapper; } } diff --git a/core/modules/file/file.module b/core/modules/file/file.module index c662493..9858bd0 100644 --- a/core/modules/file/file.module +++ b/core/modules/file/file.module @@ -46,14 +46,12 @@ function file_menu() { $items = array(); $items['file/ajax'] = array( - 'page callback' => 'file_ajax_upload', - 'access arguments' => array('access content'), + 'route_name' => 'file.ajax.upload', 'theme callback' => 'ajax_base_page_theme', 'type' => MENU_CALLBACK, ); $items['file/progress'] = array( - 'page callback' => 'file_ajax_progress', - 'access arguments' => array('access content'), + 'route name' => 'file.ajax.progress', 'theme callback' => 'ajax_base_page_theme', 'type' => MENU_CALLBACK, ); @@ -960,104 +958,6 @@ function file_save_upload($form_field_name, $validators = array(), $destination } /** - * Ajax callback: Processes file uploads and deletions. - * - * This rebuilds the form element for a particular field item. As long as the - * form processing is properly encapsulated in the widget element the form - * should rebuild correctly using FAPI without the need for additional callbacks - * or processing. - * - * @see file_menu() - */ -function file_ajax_upload() { - $form_parents = func_get_args(); - $form_build_id = (string) array_pop($form_parents); - - $request = \Drupal::request(); - if (!$request->request->has('form_build_id') || $form_build_id != $request->request->get('form_build_id')) { - // Invalid request. - drupal_set_message(t('An unrecoverable error occurred. The uploaded file likely exceeded the maximum file size (@size) that this server supports.', array('@size' => format_size(file_upload_max_size()))), 'error'); - $response = new AjaxResponse(); - $status_messages = array('#theme' => 'status_messages'); - return $response->addCommand(new ReplaceCommand(NULL, drupal_render($status_messages))); - } - - list($form, $form_state) = ajax_get_form(); - - if (!$form) { - // Invalid form_build_id. - drupal_set_message(t('An unrecoverable error occurred. Use of this form has expired. Try reloading the page and submitting again.'), 'error'); - $response = new AjaxResponse(); - $status_messages = array('#theme' => 'status_messages'); - return $response->addCommand(new ReplaceCommand(NULL, drupal_render($status_messages))); - } - - // Get the current element and count the number of files. - $current_element = $form; - foreach ($form_parents as $parent) { - $current_element = $current_element[$parent]; - } - $current_file_count = isset($current_element['#file_upload_delta']) ? $current_element['#file_upload_delta'] : 0; - - // Process user input. $form and $form_state are modified in the process. - drupal_process_form($form['#form_id'], $form, $form_state); - - // Retrieve the element to be rendered. - foreach ($form_parents as $parent) { - $form = $form[$parent]; - } - - // Add the special Ajax class if a new file was added. - 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'] .= ''; - } - - $status_messages = array('#theme' => 'status_messages'); - $form['#prefix'] .= drupal_render($status_messages); - $output = drupal_render($form); - $js = drupal_add_js(); - $settings = drupal_merge_js_settings($js['settings']['data']); - - $response = new AjaxResponse(); - return $response->addCommand(new ReplaceCommand(NULL, $output, $settings)); -} - -/** - * Ajax callback: Retrieves upload progress. - * - * @param $key - * The unique key for this upload process. - */ -function file_ajax_progress($key) { - $progress = array( - 'message' => t('Starting upload...'), - 'percentage' => -1, - ); - - $implementation = file_progress_implementation(); - if ($implementation == 'uploadprogress') { - $status = uploadprogress_get_info($key); - if (isset($status['bytes_uploaded']) && !empty($status['bytes_total'])) { - $progress['message'] = t('Uploading... (@current of @total)', array('@current' => format_size($status['bytes_uploaded']), '@total' => format_size($status['bytes_total']))); - $progress['percentage'] = round(100 * $status['bytes_uploaded'] / $status['bytes_total']); - } - } - elseif ($implementation == 'apc') { - $status = apc_fetch('upload_' . $key); - if (isset($status['current']) && !empty($status['total'])) { - $progress['message'] = t('Uploading... (@current of @total)', array('@current' => format_size($status['current']), '@total' => format_size($status['total']))); - $progress['percentage'] = round(100 * $status['current'] / $status['total']); - } - } - - return new JsonResponse($progress); -} - -/** * Determines the preferred upload progress implementation. * * @return @@ -1239,7 +1139,13 @@ function file_managed_file_process($element, &$form_state, $form) { $element['#tree'] = TRUE; $ajax_settings = array( - 'path' => 'file/ajax/' . implode('/', $element['#array_parents']) . '/' . $form['form_build_id']['#value'], + 'path' => 'file/ajax', + 'options' => array( + 'query' => array( + 'element_parents' => implode('/', $element['#array_parents']), + 'form_build_id' => $form['form_build_id']['#value'], + ), + ), 'wrapper' => $element['#id'] . '-ajax-wrapper', 'effect' => 'fade', 'progress' => array( diff --git a/core/modules/file/file.routing.yml b/core/modules/file/file.routing.yml new file mode 100644 index 0000000..c2a9efd --- /dev/null +++ b/core/modules/file/file.routing.yml @@ -0,0 +1,12 @@ +file.ajax.upload: + pattern: '/file/ajax' + defaults: + _controller: '\Drupal\file\Controller\FileWidgetAjaxController::upload' + requirements: + _permission: 'access content' +file.ajax.progress: + pattern: '/file/progress' + defaults: + _controller: '\Drupal\file\Controller\FileWidgetAjaxController::progress' + requirements: + _permission: 'access content' diff --git a/core/modules/file/lib/Drupal/file/Controller/FileWidgetAjaxController.php b/core/modules/file/lib/Drupal/file/Controller/FileWidgetAjaxController.php new file mode 100644 index 0000000..dde6bbe --- /dev/null +++ b/core/modules/file/lib/Drupal/file/Controller/FileWidgetAjaxController.php @@ -0,0 +1,119 @@ +query->get('element_parents')); + $form_build_id = $request->query->get('form_build_id'); + $request_form_build_id = $request->request->get('form_build_id'); + + if (empty($request_form_build_id) || $form_build_id !== $request_form_build_id) { + // Invalid request. + drupal_set_message(t('An unrecoverable error occurred. The uploaded file likely exceeded the maximum file size (@size) that this server supports.', array('@size' => format_size(file_upload_max_size()))), 'error'); + $response = new AjaxResponse(); + $status_messages = array('#theme' => 'status_messages'); + return $response->addCommand(new ReplaceCommand(NULL, drupal_render($status_messages))); + } + + try { + list($form, $form_state) = $this->getForm($request); + } + catch (HttpExceptionInterface $e) { + // Invalid form_build_id. + drupal_set_message(t('An unrecoverable error occurred. Use of this form has expired. Try reloading the page and submitting again.'), 'error'); + $response = new AjaxResponse(); + $status_messages = array('#theme' => 'status_messages'); + return $response->addCommand(new ReplaceCommand(NULL, drupal_render($status_messages))); + } + + // Get the current element and count the number of files. + $current_element = NestedArray::getValue($form, $form_parents); + $current_file_count = isset($current_element['#file_upload_delta']) ? $current_element['#file_upload_delta'] : 0; + + // Process user input. $form and $form_state are modified in the process. + drupal_process_form($form['#form_id'], $form, $form_state); + + // Retrieve the element to be rendered. + $form = NestedArray::getValue($form, $form_parents); + + // Add the special Ajax class if a new file was added. + if (isset($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'] .= ''; + } + + $status_messages = array('#theme' => 'status_messages'); + $form['#prefix'] .= drupal_render($status_messages); + $output = drupal_render($form); + $js = drupal_add_js(); + $settings = drupal_merge_js_settings($js['settings']['data']); + + $response = new AjaxResponse(); + return $response->addCommand(new ReplaceCommand(NULL, $output, $settings)); + } + + /** + * Returns the progress status for a file upload process. + * + * @param string $key + * The unique key for this upload process. + * + * @return \Symfony\Component\HttpFoundation\JsonResponse + * A JsonResponse object. + */ + public function progress($key) { + $progress = array( + 'message' => t('Starting upload...'), + 'percentage' => -1, + ); + + $implementation = file_progress_implementation(); + if ($implementation == 'uploadprogress') { + $status = uploadprogress_get_info($key); + if (isset($status['bytes_uploaded']) && !empty($status['bytes_total'])) { + $progress['message'] = t('Uploading... (@current of @total)', array('@current' => format_size($status['bytes_uploaded']), '@total' => format_size($status['bytes_total']))); + $progress['percentage'] = round(100 * $status['bytes_uploaded'] / $status['bytes_total']); + } + } + elseif ($implementation == 'apc') { + $status = apc_fetch('upload_' . $key); + if (isset($status['current']) && !empty($status['total'])) { + $progress['message'] = t('Uploading... (@current of @total)', array('@current' => format_size($status['current']), '@total' => format_size($status['total']))); + $progress['percentage'] = round(100 * $status['current'] / $status['total']); + } + } + + return new JsonResponse($progress); + } + +} diff --git a/core/modules/system/lib/Drupal/system/Controller/FormAjaxController.php b/core/modules/system/lib/Drupal/system/Controller/FormAjaxController.php new file mode 100644 index 0000000..f1645a7 --- /dev/null +++ b/core/modules/system/lib/Drupal/system/Controller/FormAjaxController.php @@ -0,0 +1,105 @@ +getForm($request); + drupal_process_form($form['#form_id'], $form, $form_state); + + // We need to return the part of the form (or some other content) that needs + // to be re-rendered so the browser can update the page with changed content. + // Since this is the generic menu callback used by many Ajax elements, it is + // up to the #ajax['callback'] function of the element (may or may not be a + // button) that triggered the Ajax request to determine what needs to be + // rendered. + if (!empty($form_state['triggering_element'])) { + $callback = $form_state['triggering_element']['#ajax']['callback']; + } + if (empty($callback) || !is_callable($callback)) { + throw new HttpException(500, t('Internal Server Error')); + } + return call_user_func_array($callback, array(&$form, &$form_state)); + } + + /** + * Gets a form submitted via #ajax during an Ajax callback. + * + * This will load a form from the form cache used during Ajax operations. It + * pulls the form info from the request body. + * + * @param \Symfony\Component\HttpFoundation\Request $request + * The current request object. + * + * @return array + * An array containing the $form and $form_state. Use the list() function + * to break these apart: + * @code + * list($form, $form_state, $form_id, $form_build_id) = $this->getForm(); + * @endcode + * + * @throws Symfony\Component\HttpKernel\Exception\HttpExceptionInterface + */ + protected function getForm(Request $request) { + $form_state = form_state_defaults(); + $form_build_id = $request->request->get('form_build_id'); + + // Get the form from the cache. + $form = form_get_cache($form_build_id, $form_state); + if (!$form) { + // If $form cannot be loaded from the cache, the form_build_id must be + // invalid, which means that someone performed a POST request onto + // system/ajax without actually viewing the concerned form in the browser. + // This is likely a hacking attempt as it never happens under normal + // circumstances. + watchdog('ajax', 'Invalid form POST data.', array(), WATCHDOG_WARNING); + throw new BadRequestHttpException(); + } + + // Since some of the submit handlers are run, redirects need to be disabled. + $form_state['no_redirect'] = TRUE; + + // When a form is rebuilt after Ajax processing, its #build_id and #action + // should not change. + // @see drupal_rebuild_form() + $form_state['rebuild_info']['copy']['#build_id'] = TRUE; + $form_state['rebuild_info']['copy']['#action'] = TRUE; + + // The form needs to be processed; prepare for that by setting a few internal + // variables. + $form_state['input'] = $request->request->all(); + $form_id = $form['#form_id']; + + return array($form, $form_state, $form_id, $form_build_id); + } + +} diff --git a/core/modules/system/lib/Drupal/system/Tests/Ajax/FormValuesTest.php b/core/modules/system/lib/Drupal/system/Tests/Ajax/FormValuesTest.php index b464a46..9b1781f 100644 --- a/core/modules/system/lib/Drupal/system/Tests/Ajax/FormValuesTest.php +++ b/core/modules/system/lib/Drupal/system/Tests/Ajax/FormValuesTest.php @@ -51,5 +51,15 @@ function testSimpleAjaxFormValue() { $expected = new DataCommand('#ajax_checkbox_value', 'form_state_value_select', (int) $item); $this->assertCommand($commands, $expected->render(), 'Verification of AJAX form values from a checkbox issued with a correct value.'); } + + // Verify that AJAX elements with invalid callbacks return error code 500. + foreach (array('null', 'empty', 'nonexistent') as $key) { + $element_name = 'select_' . $key . '_callback'; + $edit = array( + $element_name => 'red', + ); + $commands = $this->drupalPostAJAX('ajax_forms_test_get_form', $edit, $element_name); + $this->assertResponse(500); + } } } diff --git a/core/modules/system/system.module b/core/modules/system/system.module index 4a7cdf4..8286737 100644 --- a/core/modules/system/system.module +++ b/core/modules/system/system.module @@ -619,12 +619,9 @@ function system_menu() { ); $items['system/ajax'] = array( 'title' => 'AHAH callback', - 'page callback' => 'ajax_form_callback', - 'access callback' => TRUE, + 'route_name' => 'system.ajax', 'theme callback' => 'ajax_base_page_theme', 'type' => MENU_CALLBACK, - 'file path' => 'core/includes', - 'file' => 'form.inc', ); $items['admin'] = array( 'title' => 'Administration', diff --git a/core/modules/system/system.routing.yml b/core/modules/system/system.routing.yml index 1adf224..61363d6 100644 --- a/core/modules/system/system.routing.yml +++ b/core/modules/system/system.routing.yml @@ -1,3 +1,9 @@ +system.ajax: + pattern: '/system/ajax' + defaults: + _controller: '\Drupal\system\Controller\FormAjaxController::content' + requirements: + _access: 'TRUE' system.cron: pattern: '/cron/{key}' defaults: diff --git a/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module b/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module index 1682c01..67f5322 100644 --- a/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module +++ b/core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module @@ -72,6 +72,22 @@ function ajax_forms_test_simple_form($form, &$form_state) { '#type' => 'submit', '#value' => t('submit'), ); + + // This is for testing invalid callbacks that should return a 500 error in + // \Drupal\system\FormAjaxController::content(). + $invalid_callbacks = array( + 'null' => NULL, + 'empty' => '', + 'nonexistent' => 'some_function_that_does_not_exist', + ); + foreach ($invalid_callbacks as $key => $value) { + $form['select_' . $key . '_callback'] = array( + '#type' => 'select', + '#options' => array('red' => 'red'), + '#ajax' => array('callback' => $value), + ); + } + return $form; }