Frozennode\Administrator\AdminController::customModelAction PHP Method

    public function customModelAction($modelName)
    {
        $config = app('itemconfig');
        $actionFactory = app('admin_action_factory');
        $actionName = $this->request->input('action_name', false);
        $dataTable = app('admin_datatable');
        //get the sort options and filters
        $page = $this->request->input('page', 1);
        $sortOptions = $this->request->input('sortOptions', array());
        $filters = $this->request->input('filters', array());
        //get the prepared query options
        $prepared = $dataTable->prepareQuery(app('db'), $page, $sortOptions, $filters);
        //get the action and perform the custom action
        $action = $actionFactory->getByName($actionName, true);
        $result = $action->perform($prepared['query']);
        //if the result is a string, return that as an error.
        if (is_string($result)) {
            return response()->json(array('success' => false, 'error' => $result));
        } elseif (!$result) {
            $messages = $action->getOption('messages');
            return response()->json(array('success' => false, 'error' => $messages['error']));
        } else {
            $response = array('success' => true);
            //if it's a download response, flash the response to the session and return the download link
            if (is_a($result, 'Symfony\\Component\\HttpFoundation\\BinaryFileResponse')) {
                $file = $result->getFile()->getRealPath();
                $headers = $result->headers->all();
                $this->session->put('administrator_download_response', array('file' => $file, 'headers' => $headers));
                $response['download'] = route('admin_file_download');
            } elseif (is_a($result, '\\Illuminate\\Http\\RedirectResponse')) {
                $response['redirect'] = $result->getTargetUrl();
            }
            return response()->json($response);
        }
    }