how to set default theme in twig? - twig

Question

I use a silex with twig;
I create custom form_div_layout and put it in the webroot( for example)
I register TwigService provider like this
$app->register(new Silex\Provider\TwigServiceProvider(), array(
'twig.path' => __DIR__ . '/../views',
'twig.options' => array(
'cache' => __DIR__ . '/../cache/twig',
'strict_variables' => false
),
'twig.form.templates'=> [WEBROOT . '/form_div_layout.twig']
));
but i have an error
Twig_Error_Loader: Template "/home/versh/sale/web/form_div_layout.twig" is not defined () in "layout.twig" at line 52.
how to register theme correctly ?
I know that if i put theme in the twig.path it will work, but this is not solution

Answer 1

I'm using Twig with namespaces and I think it is the most flexible practice:
$app->register(new Silex\Provider\TwigServiceProvider(), array(
'twig.options' => array(
'cache' => true,
'strict_variables' => true,
'debug' => false,
'autoescape' => true
)
));
// set namespace for your application
$app['twig.loader.filesystem']->addPath(WHERE_EVER_YOU_WANT_PATH, 'yourApplication');
Now you can render templates using the namespace:
return $app['twig']->render('#yourApplication/sample.twig', array());
you can define as many namespaces as you need.

Answer 2

You have to add base template form_div_layout.html.twig to twig.form.templates option too.
$app->register(new Silex\Provider\TwigServiceProvider(), array(
'twig.path' => __DIR__.'/../views',
'twig.options'=>array(
'cache' => __DIR__.'/../cache',
),
'twig.form.templates' => array(
'form_div_layout.html.twig',
'theme/form_div_layout.twig'
),
));