symfony2 - twig - how to render a twig template from inside a twig template

Question

I have a xxx.html.twig file which shows a page, but when I want to refresh the page with different data and just update it with new data, I have a select and a submit button for

Answer 1

Symfony 2.1:

{% render 'YourBundle:YourController:yourAction' with {'var': value} %}

Symfony 2.6+:

{{ render(controller('YourBundle:YourController:yourAction', {'var': value})) }}

And, of course, read the documentation.