Symfony2 Form Entity Update

Question

Can anyone please show me a specific example of a Symfony2 form entity update? The book only shows how to create a new entity. I need an example of how to update an existing entity where I initially pass the id of the entity on the query string.

I'm having trouble understanding how to access the form again in the code that checks for a post without re-creating the form.

And if I do recreate the form, it means I have to also query for the entity again, which doesn't seem to make much sense.

Here is what I currently have but it doesn't work because it overwrites the entity when the form gets posted.

public function updateAction($id) {     $em = $this->getDoctrine()->getEntityManager();     $testimonial = $em->getRepository('MyBundle:Testimonial')->find($id);     $form = $this->createForm(new TestimonialType(), $testimonial);      $request = $this->get('request');     if ($request->getMethod() == 'POST') {         $form->bindRequest($request);          echo $testimonial->getName();          if ($form->isValid()) {             // perform some action, such as save the object to the database             //$testimonial = $form->getData();             echo 'testimonial: ';             echo var_dump($testimonial);             $em->persist($testimonial);             $em->flush();              return $this->redirect($this->generateUrl('MyBundle_list_testimonials'));         }     }      return $this->render('MyBundle:Testimonial:update.html.twig', array(         'form' => $form->createView()     )); } 

Answer 1

Working now. Had to tweak a few things:

public function updateAction($id) {     $request = $this->get('request');      if (is_null($id)) {         $postData = $request->get('testimonial');         $id = $postData['id'];     }      $em = $this->getDoctrine()->getEntityManager();     $testimonial = $em->getRepository('MyBundle:Testimonial')->find($id);     $form = $this->createForm(new TestimonialType(), $testimonial);      if ($request->getMethod() == 'POST') {         $form->bindRequest($request);          if ($form->isValid()) {             // perform some action, such as save the object to the database             $em->flush();              return $this->redirect($this->generateUrl('MyBundle_list_testimonials'));         }     }      return $this->render('MyBundle:Testimonial:update.html.twig', array(         'form' => $form->createView()     )); } 

Answer 2

This is actually a native function of Symfony 2 :

You can generate automatically a CRUD controller from the command line (via doctrine:generate:crud) and the reuse the generated code.

Documentation here : http://symfony.com/doc/current/bundles/SensioGeneratorBundle/commands/generate_doctrine_crud.html