php - How to generate absolute URL in custom form type? -

i have example custom form type:

namespace acme\simplebundle\form\type;  use symfony\component\form\abstracttype; use symfony\component\form\formbuilderinterface; use symfony\component\optionsresolver\optionsresolverinterface;  class exampletype extends abstracttype {      public function buildform(formbuilderinterface $builder, array $options)     {          $builder->setaction(****-----generate-route-absolute-url-here-----****)                 ->add('email', 'text')                 ->add('send', 'submit');     }      public function getname()     {          return 'example';     }      public function setdefaultoptions(optionsresolverinterface $resolver)     {         $resolver->setdefaults(array(             'error_bubbling' => true         ));     }  } 

how can generate absolute url (like http://example.com/admin/check_form) route?

$this->generateurl() doesn't work, becuse it's not controller, , $this->get('router')->generate() doesn't work, don't know why.

there 2 ways it:

• register form type service , inject router in it: doc

• pass action option when create form in controller:

   $form = $this->createform(new formtype(), null, array('action' => $this->generateurl('your_route', array(/* route parameters */), true)); 

  note must pass true last argument in order force router generate absolute url (as asked for symfony < 2.8). if you're using symfony3, use urlgeneratorinterface::absolute_url instead of true suggested emilie in comments.