php - Lost old value file when edit form submit symfony2 -


i got edit form (project) field file upload picture. in database got column 'img' save upload picture.

but want user, if don't upload new picture, got old img.

i old img repository:

public function editaction(request $request, projet $projet) {      $editform = $this->createform('bbw\projetsbundle\form\projettype', $projet);     $editform->handlerequest($request);     $em = $this->getdoctrine()->getmanager();      $repository = $em->getrepository('bbwprojetsbundle:projet');     $old = $repository->findonebyid($projet->getid()); // données bdd actuel      $old_img = $old->getimg();     var_dump( $old_img ); // got old name img in database - ex: img.png       if ($editform->issubmitted() && $editform->isvalid()) {          var_dump( $old_img ); // got null img ..          $file = $projet->getimg(); // new file upload - here got null img ( when upload no file )         if( $file != null ){ // if send image - field img not empty , got new picture             // want delete old img - not name of old img, doesn't remove             $fs = new filesystem();             $fs->remove( $this->getparameter('uploads_dir_projets') . '/' . $old_img ); // old_img = null :(             $filename = md5(uniqid()).'.'.$file->guessextension();             $file->move( // move new file, etc ..                 $this->getparameter('uploads_dir_projets'),                 $filename             );             $projet->setimg( $filename );         }else{             // in case leave field empty img - here no new file upload file = null             // when submit edit form,             // replace old value in database null. don't want replace old value if no new picture upload             $projet->setimg( $old_img ); // set same name img         }          //$em->persist($projet);         //$em->flush();          //$request->getsession()->getflashbag()->add('success', 'projet modifié avec succès');          //return $this->redirecttoroute('bbw_projet_home');     }      return $this->render('bbwprojetsbundle:projet:edit.html.twig', array(         'projet' => $projet,         'edit_form' => $editform->createview(),     )); }

i don't understand how :/ lot help.

check piece of code below: if there no picture uploaded, old value remains unchanged:

$projet = $editform->getdata();  if (isset($projet['file']) && $projet['file'] instanceof uploadedfile) {      if ($projet['file']->geterror() == 0) {         $filename = md5(uniqid()).'.'.$file->guessextension();         // move file...          $projet->setimg( $filename );     } else {         // report/track error     }      $em->persist($projet);     $em->flush(); }

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