public function buildForm()
 {
     parent::buildForm();
     $this->formBuilder->add("id", "hidden", array("constraints" => array(new GreaterThan(array('value' => 0)))));
 }
 public function buildForm()
 {
     parent::buildForm();
     $this->formBuilder->add("area_id", "hidden", ["constraints" => [new GreaterThan(['value' => 0])]]);
 }