public function createSurvey(Request $request) {
    //check if user is authenticated
    if($current_user = $this->getUser()) {
        //check if user is admin
        if($current_user->getRole() == 'ROLE_ADMIN') {
            $survey = new Survey();
            $form = $this->createForm(SurveyType::class, $survey);

            $form->handleRequest($request);

            if ($form->isSubmitted() && $form->isValid()) {
                $entityManager = $this->getDoctrine()->getManager();

                //get the data from the form
                $survey = $form->getData();

                //since each of the options needs to be linked to the survey, get all options
                //the code seems to fail here, because the array is empty
                $options = $survey->getOptions();

                //because the survey already contains the options and it would not add them,
                //reset the array inside the survey entity
                $survey->resetOptions();

                //for each of the options,
                foreach($options as $option) {

                    //first set the amount the option has been voted on to 0
                    $option->setVotes(0);

                    //then add it to the survey entity again- the survey will also add itself to the inverse side this way
                    $survey->addOption($option);

                    //and finally persist the option entity
                    $entityManager->persist($option);
                }

                //make sure the survey is unlocked so it can be voted on
                $survey->unlock();

                //and persist the survey, and force the entity manager to save all the entities
                $entityManager->persist($survey);
                $entityManager->flush();

                //then return to the home page
                return $this->redirectToRoute("app_blog_list");
            }

            //render the form
            return $this->render('blog/blog.survey.new.twig', [
                'form' => $form->createView(),
            ]);
        } else {
            return $this->redirectToRoute("app_blog_list");
        }
    } else {
    return $this->redirectToRoute("app_blog_list");
    }
}