如何在symfony 2中将对象作为renderView（）参数传递

Question

I have a problem with symfony 2 ( I'm pretty new with this framework and I would like to learn how to use correctly so I hope you can help me).

My problem is the following:

I want to show a product in a template and I need to pass some parameters like name, description and price about him:

public function showAction($id)
{
    $product = $this->getDoctrine()->getRepository('AcmeReadBundle:Product')->find($id);
    if(!$product)
    {
        throw $this->createNotFoundException('error: not found');
    }
    $content = $this->renderView('AcmeReadBundle:Show:index.html.twig',$product);
    return new Response($content);
}

If I do this I have this error:

Catchable Fatal Error: Argument 2 passed to Symfony\Bundle\FrameworkBundle\Controller\Controller::renderView() must be of the type array, object given

How can I fix this?

Answer 1

you did quite alright, except you should pass parameters to templates in an array and it is better to return rendered template directly!

public function showAction($id)
{
    $product = $this->getDoctrine()->getRepository('AcmeReadBundle:Product')->find($id);
    if(!$product)
    {
        throw $this->createNotFoundException('error: not found');
    }
    return $this->render('AcmeReadBundle:Show:index.html.twig', array('product'=> $product));
}

Answer 2

you need to put:

$return $this->renderView('AcmeReadBundle:Show:index.html.twig',array('product' => $product));

you shoud pass parameters like array

Answer 3

If template AcmeReadBundle:Show:index.html.twig is made for Product , it is wrong to put another "product" prefix in front of expressions, like so:

{{ product.title }}
{{ product.price }}

It is right to look it like this:

{{ title }}
{{ price }}

in template. So wrapping is a bad option. Best option is to use get_object_vars() , it automatically converts object to an array:

return $this->render('AcmeReadBundle:Show:index.html.twig', get_object_vars($product));        

This way you can use this template calling it from another template (because it doesn't contain "product"-prefix before every expression), when iterating thru Products collection for example, because your Products collection would contain collection of Products , not collection of Arrays of 1 object which is Product .