public function getRequestData() {
        $data = $this->Controller->request->data;

        if ($data) {
            foreach ($data as $model => $fields) {
                foreach ($fields as $key => $value) {
                    if (
                        (mb_substr($key, -5) === '_null') ||
                        (mb_substr($key, -11) === '_type_ahead') ||
                        in_array($key, array('redirect_to', 'log_comment', 'report_action'))
                    ) {
                        unset($data[$model][$key]);
                    }
                }
            }
        }

        return $data;
    }