ZF2, pass variable to custom element from controller - php

Question

In ZF2, I have a custom form element factory. It creates a custom MultiCheckbox and fills the checkbox values and labels from a db query.
class MyMultiCheckboxFactory
{
public function __invoke(FormElementManager $formElementManager)
{
$multiCheck = new \Zend\Form\Element\MultiCheckbox();
$serviceManager = $formElementManager->getServiceLocator();
$mapper = $serviceManager->get('Path\To\Mapper\To\Query\DB');
$descriptions = $mapper->findDescriptions($id);
// some processing to prepare $value_options array
$multiCheck->setOptions([
'label' => 'blah-blah',
'value_options' => $value_options
]);
return $multiCheck;
}
}
My problem is as follows. The method findDescriptions($id) depends on the $id which I can get from the route. But when I use MyMultiCheckbox in the form like this:
public function init()
{
$this->add([
'type' => 'Path\To\MyMultiCheckbox',
'name' => 'someName'
]);
}
I don't know how to pass the $id into the MyMultiCheckbox.
Could anyone help pleeeeeeeeeease?

Answer 1

You can fetch the id via the 'route match' instance inside the factory.
$event = $serviceManager->get('Application')->getMvcEvent();
$id = $event->getRouteMatch()->getParam('id', false);
if (empty($id)) {
throw new ServiceNotCreatedException('id not set!');
}
$descriptions = $mapper->findDescriptions($id);