protected function _filterParams()
{
$params = Hash::filter($this->request->data);
if (!$this->config('queryStringWhitelist')) {
return $params;
}
foreach ($this->config('queryStringWhitelist') as $field) {
if (!isset($params[$field]) && $this->request->query($field) !== null) {
$params[$field] = $this->request->query($field);
}
}
return $params;
}