How to render TWIG output to a variable for later use (symfony2)?

Question

Instead of doing this rendering of each slide in my TWIG like this (see line 6):

{# loop out the slides #}
{% for c in contents %}
    {% set i=i+1 %} {# increas         


        

Answer 1

That is because $this->render() returns a Response object. Instead of $this->render(), use $this->renderView().