Symfony\Component\HttpFoundation\Request::get PHP 메소드

    public function get($key, $default = null)
    {
        if ($this !== $result = $this->attributes->get($key, $this)) {
            return $result;
        }

        if ($this !== $result = $this->query->get($key, $this)) {
            return $result;
        }

        if ($this !== $result = $this->request->get($key, $this)) {
            return $result;
        }

        return $default;
    }

 /**
  * Perform an action on a Contenttype record.
  *
  * The action part of the POST request should take the form:
  * [
  *     contenttype => [
  *         id => [
  *             action => [field => value]
  *         ]
  *     ]
  * ]
  *
  * For example:
  * [
  *     'pages'   => [
  *         3 => ['modify' => ['status' => 'held']],
  *         5 => null,
  *         4 => ['modify' => ['status' => 'draft']],
  *         1 => ['delete' => null],
  *         2 => ['modify' => ['status' => 'published']],
  *     ],
  *     'entries' => [
  *         4 => ['modify' => ['status' => 'published']],
  *         1 => null,
  *         5 => ['delete' => null],
  *         2 => null,
  *         3 => ['modify' => ['title' => 'Drop Bear Attacks']],
  *     ]
  * ]
  *
  * @param Request $request Symfony Request
  *
  * @return Response
  */
 public function action(Request $request)
 {
     //         if (!$this->checkAntiCSRFToken($request->get('bolt_csrf_token'))) {
     //             $this->app->abort(Response::HTTP_BAD_REQUEST, Trans::__('Something went wrong'));
     //         }
     $contentType = $request->get('contenttype');
     $actionData = $request->get('actions');
     if ($actionData === null) {
         throw new \UnexpectedValueException('No content action data provided in the request.');
     }
     foreach ($actionData as $contentTypeSlug => $recordIds) {
         if (!$this->getContentType($contentTypeSlug)) {
             // sprintf('Attempt to modify invalid ContentType: %s', $contentTypeSlug);
             continue;
         } else {
             $this->app['storage.request.modify']->action($contentTypeSlug, $recordIds);
         }
     }
     $referer = Request::create($request->server->get('HTTP_REFERER'));
     $taxonomy = null;
     foreach (array_keys($this->getOption('taxonomy', [])) as $taxonomyKey) {
         if ($referer->query->get('taxonomy-' . $taxonomyKey)) {
             $taxonomy[$taxonomyKey] = $referer->query->get('taxonomy-' . $taxonomyKey);
         }
     }
     $options = (new ListingOptions())->setOrder($referer->query->get('order'))->setPage($referer->query->get('page_' . $contentType))->setFilter($referer->query->get('filter'))->setTaxonomies($taxonomy);
     $context = ['contenttype' => $this->getContentType($contentType), 'multiplecontent' => $this->app['storage.request.listing']->action($contentType, $options), 'filter' => array_merge((array) $taxonomy, (array) $options->getFilter()), 'permissions' => $this->getContentTypeUserPermissions($contentType, $this->users()->getCurrentUser())];
     return $this->render('@bolt/async/record_list.twig', ['context' => $context]);
 }