Generate a path appending query string in Symfony2

As simple as :

{{ path('route_id', app.request.query.all) }}

A nice thing with path Twig extension is that unknow parameters passed through the args array are automatically appended at the end of the URL as GET paramaters :

{{ path('route_id', {'routeParam':'foo', 'unknownParam':'bar'}) }}

will produce

/path/to/route/foo?unknownParam=bar