Symfony 2 - 删除操作后的重定向进入错误的URL

I'm working on a project in Symfony 2, and I have inside a view a link which calls a delete form; I followed Best practices - Delete links with Symfony 2, to deal with this case, and it has worked, but the problem that I have is that, when I use redirect in the end of the action, I get the following problem:

The redirect goes to

/Stock/boncommande/27/boncommande

but I want it to be

/Stock/boncommande

Here is the code of the different parts involved:

Controller/Action

/**
 * Deletes a Boncommande entity.
 *
 * @Route("/{id}", name="boncommande_delete")
 * @Method("DELETE")
 * 
 */
public function deleteAction(Request $request, $id) {
    $form = $this->createDeleteForm($id);
    $form->handleRequest($request);

    if ($form->isValid()) {
        $em = $this->getDoctrine()->getManager();
        $entity = $em->getRepository('StockStockBundle:Boncommande')->find($id);

        if (!$entity) {
            throw $this->createNotFoundException('Unable to find Boncommande entity.');
        }

        $em->remove($entity);
        $em->flush();
    }

    return $this->redirect($this->generateUrl("boncommande"));
}

/**
 * Creates a form to delete a Boncommande entity by id.
 *
 * @param mixed $id The entity id
 *
 * @return \Symfony\Component\Form\Form The form
 */
private function createDeleteForm($id) {
    return $this->createFormBuilder()
                    ->setAction($this->generateUrl('boncommande_delete', array('id' => $id)))
                    ->setMethod('DELETE')
                    ->add('submit', 'submit', array('label' => 'Delete'))
                    ->getForm()
    ;
}

Routing file

    #bon de commande
boncommande:
    pattern:  /boncommande
    defaults: { _controller: StockStockBundle:Boncommande:index }
boncommande_delete:
    pattern: /boncommande/{id}/delete
    defaults: {_controller: StockStockBundle:Boncommande:delete}
    requirements:
        _method:  POST|GET 

Link in view

<a href="{{path('boncommande_delete', { 'id': entity.idbc })}}" id="stock_stockbundle_annuler" class="as-form btn red"
                       data-method="delete"> Annuler</a>

JQuery code

$('.as-form').on('click',function(){

            var $form = $('<form/>').hide();

            //form options
            $form.attr({
                'action' : $(this).attr('href'),
                'method':'post'
            })

            //adding the _method hidden field
            $form.append($('<input/>',{
                type:'hidden',
                name:'_method'
            }).val($(this).data('method')));



            //add form to parent node
            $(this).parent().append($form);

            $form.submit();

            return false;
           });

Thanks in advance for help!