How to load a controller function and render it in a twig tag using Symfony2? - symfony

Question

I am using Symfony2 and Twig. I have a function (below) in my controller that returns a specific text. Is it possible to call that function directly from my template and change the {{text}} in my template to whatever the function returns, possibly via Ajax?
Here's my function:
public function generateCode($url) {
$url = $_SERVER['SERVER_NAME'] . '/embed/' . $url;
$return = '<iframe>'.$url.'</iframe>';
return $return;
}
Another controller function calls the function above and renders my template:
public function getCodeAction($url) {
$text = $this->generateCode($url);
return $this->render('MyMyBundle:User:code.html.twig', array('text' => $text));
}
In my template I am using:
{{ text }}
to display the value.

Answer 1

In Symfony 2.2, this was changed.
The render tag signature and arguments changed.
Before:
{% render 'BlogBundle:Post:list' with { 'limit': 2 }, { 'alt': BlogBundle:Post:error' } %}
After:
{% render controller('BlogBundle:Post:list', { 'limit': 2 }), { 'alt': 'BlogBundle:Post:error' } %}
or
{{ render(controller('BlogBundle:Post:list', { 'limit': 2 }), { 'alt': 'BlogBundle:Post:error'}) }}
Note: The function is the preferred way.
See https://github.com/symfony/symfony/blob/2.2/UPGRADE-2.2.md

Answer 2

You can use ajax if you have dynamic data, but as far as I can see from your brief info, you can always execute that controller function directly from your view:
{% render "MyMyBundle:User:generateCode" with { 'url': 'your url here' } %}
More Information on this available at:
http://symfony.com/doc/2.0/quick_tour/the_view.html, under Embedding other Controllers

Answer 3

For the record, in new versions you need to use the absolute URL:
{{ render url('my_route_id', {'param': value}) }}

Answer 4

{{ render(controller("AcmeDemoBundle:Demo:topArticles", {'num': 10})) }}

Answer 5

In Silex I solved it like this:
{{ render(url('route_name', {'param': value})) }}
If you do not have the route name, URL can be used:
{{ render(app.request.baseUrl ~ '/some-path/' ~ value) }}
If using URL we should always concat the baseUrl.

Answer 6

Symfony 2.6+
in twig:
{{ render(controller('AppBundle:PropertySearch:featuredProperties', {'limit': 15})) }}
controller:
/**
* featuredPropertiesAction
*
* #param Request $request
* #param int $limit
*
* #return Response
*/
public function featuredPropertiesAction(Request $request, $limit)
{
$search = $this->resultsHelper->featuredSearch($limit);
return $this->render('HASearchBundle::featured_properties.html.twig', [
'search' => $search,
]);
}