Symfony2 beta upload file

Yes, there is currently no documentation on how to upload a file in Symfony2. Yes, it took me hours to figure out how to do it. Yes, of course I will share!
I don’t think this is the correct Symfony way to do it, but it works and I believe it is secure. I would like to access the $uploadedFile object from the $form object instead of the $request. If you know how to do it, please write a comment.

The code is pretty straight forward and documented so I figure I just post it.

My controller:

public function indexAction()
{
    //create a simple form with one filed called "dataFile" of type "file"
    $form = $this->get('form.factory')
	 ->createBuilder('form')
	 ->add("dataFile","file", array("required"=>true))
	 ->getForm();

    $request = $this->get('request');
    if ($request->getMethod() == 'POST') {
        //bind the request, (note the enctype in the template)
      	$form->bindRequest($request); 

    	if ($form->isValid()) {
            //if the form is valid, try to get the uploaded file object
            //Symfony\Component\HttpFoundation\File\UploadedFile
    	    $files=$request->files->get($form->getName());
    	    $uploadedFile=$files["dataFile"]["file"]; //"dataFile" is the name on the field
    	
            //once you have the uploadedFile object there is some sweet functions you can run
    	    $uploadedFile->getPath();//returns current (temporary) path
    	    $uploadedFile->getOriginalName();
    	    $uploadedFile->getMimeType();

            //and most important is move(), 
    	    $uploadedFile->move(
    	        $_SERVER['DOCUMENT_ROOT']."/uploads",
    	        $uploadedFile->getOriginalName()
    	    );

    	    $this->get('session')->setFlash('notice', 'The file is uploaded!');
    	}
    	else{
    		//form is not valid
	        	
    	}
    }//end if request method == POST	
	    	
    return $this->render('ApplicationMyBundle:Default:index.html.twig',
        array("form"=>$form->createView()));
    }

My template:

{# note the form_enctype, without it the form will not bind in the controller #}
<form action="" method="post" {{ form_enctype(form) }}>
{{ form_widget(form) }}
<input type="submit" class="submit" id="form_submit" value="Save" />
</form>