gistfile1.php

    public function editAction(Person $person, Request $request)
    {
        $form = $this->formFactory->create('person_edit', $person);

        if ($request->getMethod() == 'POST') {
            $form->bind($request);

            if ($form->isValid()) {
                $this->manager->update($person);
                $this->flashes->add('success', 'Profile updated successfully.');

                return new RedirectResponse($this->urlGenerator->generate(
                    'people_view',
                    array('id' => $person->getId())
                ));
            }
        }

        return new Response(
            $this->templating->render('BundleName:People:edit.html.twig', array(
                'form' => $form->createView(),
                'person' => $person
            ))
        );
    }