Controller

BookController.php

	public function createAction(Request $request) {
		$user = $this->get('security.context')->getToken()->getUser();

		$book = new Book();

		$form = $this->createForm(new BookType($user->getId()), $book);

		$form->handleRequest($request);

		if($form->isValid()) {
			$book->upload();
			$em = $this->getDoctrine()->getManager();
			$em->persist($book);
			$em->flush();

			$covers = $request->files->get('covers');
			foreach ($covers as $cover) {
				$coverObj = new BookCover();
				$coverObj->setFile($cover);
				$coverObj->setBook($book);
				$coverObj->upload();

				$em->persist($coverObj);
			}
			$em->flush();
			return $this->redirect($this->generateUrl('matiit_book_homepage'));
		}

		return $this->render('MatiitBookBundle:Book:new.html.twig', ['form' => $form->createView()]);
	}