database - retrieve single record with kohana 3.3 with request->param() is NULL -

i try use kohana framework have little issue wen try retrieve single record table of database. table:

ads  id_ads  title_ads  description_ads 

my controller:

public function action_single() {     $ads_id = $this->request->param('id_ads');     $ads = orm::factory('ads', $ads_id);      $view = new view('ads/single');  // load view/ads/single.php     $view->set('ads', $ads);        // set 'ads' object view      $this->template->set('content', $view); } 

my view

<h2><?php echo $ads->title_ads; ?></h2> <pre><?php echo $ads->description_ads; ?></pre> 

when go to localhost/kohana/index.php/ads/single/1 browser display nothing, problem?

try this:

$ads_id = $this->request->param('id_ads'); $ads =orm::factory('ads'->find($ads_id); 

or

$ads_id = $this->request->param('id_ads'); $ads =orm::factory('ads')->where("id","=",$ads_id)->find(); 

to pass parameters, think, better (easier) extend controller_template in way:

class controller_news extends controller_template{ ...    public function action_single()    {      ...      $view->ads=$ads;      $this->template->content = $view;    } }