Symfony 3 File Upload In Edit Form

i have an entity 'Cours' with a field 'image'. this is the builder of CoursType.php $builder ->add('titre') ->add('image', FileType::class, array('data_cla

Solution 1:

Should be something like this:

public function editAction(Request $request, Cours $cour) {
    //fetch current img is exists
    $img=$cour->getImage();
    if($img !== null) {
        $cour->setImage(new File($this->getParameter('images_directory').$img);
    }

    $em = $this->getDoctrine()->getManager();
    $deleteForm = $this->createDeleteForm($cour);
    $editForm = $this->createForm('LearnBundle\Form\CoursType', $cour);
    $editForm->handleRequest($request);

    if ($editForm->isSubmitted() && $editForm->isValid()) {
        //Check if new image was uploaded
        if($cour->getImage() !== null) {
            //Type hint
            /** @var Symfony\Component\HttpFoundation\File\UploadedFile $newImage*/
            $newImage=$cour->getImage();
            $newImageName= md5(uniqid()).'.'.$file->guessExtension();
            $newImage->move($this->getParameter('images_directory'), $newImageName);
            $cour->setImage($newImageName);
        } else {
            //Restore old file name
            $cour->setImage($img);
        }

        $em->flush();

        return $this->redirectToRoute('cours_edit', array('id' => $cour->getId()));
    }

    return $this->render('cours/edit.html.twig', array(
        'cour' => $cour,
        'edit_form' => $editForm->createView(),
        'delete_form' => $deleteForm->createView(),

    ));
}