public function index(Request $request)
{
$model = $this->getModelFromRequest($request);
$collectionName = $request->get('collectionName');
$media = $model->getMedia($collectionName)->reduce(function (Collection $collection, Media $media) {
return $collection->push(['thumb' => $media->getUrl('admin'), 'image' => $media->getUrl('redactor'), 'name' => $media->name]);
}, new Collection());
return response()->json($media);
}