Controller/UserController.php
public function resetPasswordAction(Request $request, $id)
    {
        $em = $this->getDoctrine()->getManager();
        $user = $em->getRepository('Orkestra\Bundle\ApplicationBundle\Entity\User')->find($id);

        if (!$user) {
            throw $this->createNotFoundException('Unable to locate User');
        }

        $form = $this->createForm(ChangePasswordType::class, null, array('require_current' => false));

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

            if ($form->isValid()) {
                $data = $form->getData();

                $factory = $this->get('security.encoder_factory');
                $encoder = $factory->getEncoder($user);
                $user->setPassword($encoder->encodePassword($data['password'], $user->getSalt()));

                $em->persist($user);
                $em->flush();

                $this->get('session')->getFlashBag()->set('success', 'The password has been changed.');

                return $this->redirect($this->generateUrl('orkestra_user_show', array('id' => $id)));
            }
        }

        return array(
            'user' => $user,
            'form' => $form->createView(),
        );
    }
public function resetPasswordAction(Request $request, $id)
    {
        $em = $this->getDoctrine()->getManager();
        $user = $em->getRepository('Orkestra\Bundle\ApplicationBundle\Entity\User')->find($id);

        if (!$user) {
            throw $this->createNotFoundException('Unable to locate User');
        }

        $form = $this->createForm(ChangePasswordType::class, null, array('require_current' => false));

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

            if ($form->isValid()) {
                $data = $form->getData();

                $factory = $this->get('security.encoder_factory');
                $encoder = $factory->getEncoder($user);
                $user->setPassword($encoder->encodePassword($data['password'], $user->getSalt()));

                $em->persist($user);
                $em->flush();

                $this->get('session')->getFlashBag()->set('success', 'The password has been changed.');

                return $this->redirect($this->generateUrl('orkestra_user_show', array('id' => $id)));
            }
        }

        return array(
            'user' => $user,
            'form' => $form->createView(),
        );
    }
Reset Password Action

@Route("/{id}/reset-password", name="orkestra_user_password_reset")
@Template()
@Secure(roles="ROLE_USER_WRITE")