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])]]);
}