CakePHP: Save and Show

In this small code snippet I show how to store some formulary data corresponding to an ad, and after saving redirect to the page to show the stored values.

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<?php   //...   class AdsController extends AppController {      public function add() {          if ($this->request->is('post')) {          if ($this->Ad->save($this->request->data)) {               $this->Session->setFlash('The ad was saved!');               $inserted_id = $this->Ad->id;                            $this->redirect(array('action' => 'view', $inserted_id ));          } else {              $this->Session->setFlash('The ad could not be saved!');          }   }   // ...     }        // ...     public function view($id) {         $this->Ad->id = $id;         $this->set('ad', $this->Ad->read());     }    }

The key line is the redirect. It took me a while to figure out how could I pass the just inserted id to the view page.