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I create a new object and bind it to a form. The user fills out the form and goes to a preview page. I store the user responses in the session. The problem crops up when I try to reload the object from the session when the user goes back to edit the form. I get : Error: the Entities passed to the choice field must be managed. Anyone have an idea of where i might be going wrong? Heres the code for the controllers. public function previewdealAction(Request $request){ $session = $this->getRequest()->getSession(); $coupon = $session->get('coupon'); $form = $this->createForm(new CouponType(), $coupon); if ($request->getMethod() == 'POST') { //bind the posted form values $form->bindRequest($request); //once a valid form is submitted ... if ($form->isValid()){ //Proceed to Previewing deal $file = $coupon->getImage(); $file->upload(); $session->set('coupon', $coupon); $repository = $this->getDoctrine() ->getRepository('FrontendUserBundle:Coupon'); $coupons = $repository->findAll(); return $this->render('FrontendHomeBundle:Merchant:dealpreview.html.twig', array('coupon'=>$coupon, 'coupons'=>$coupons)); } } } public function builddealAction(Request $request){ $em = $this->get('doctrine')->getEntityManager(); $user = $this->container->get('security.context')->getToken()->getUser(); //check for a coupon session variable $session = $this->getRequest()->getSession(); $coupon = $session->get('coupon'); //If coupon is not set if($coupon == NULL){ $coupon = new Coupon(); $date = new \DateTime(date("Y-m-d H:i:s")); $coupon->setStartdate($date); $coupon->setPosterid($user); $session->set('coupon',

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