public function downloadAll($crudeName = null, $id = null)
    {
        if (! $crudeName || ! $id)
            return redirect()->back();

        $crude = CrudeInstance::get($crudeName);
        if (! $crude)
            return redirect()->back();

        $model = $crude->getModel()->find($id);
        if (! $model)
            return redirect()->back();

        $filesZip = CrudeZip::run($model);
        if (! $filesZip)
            return redirect()->back();

        return response()->download($filesZip, $crudeName . '-' . $id . '.zip')->deleteFileAfterSend(true);
    }