ZF2, pass variable to custom element from controller

问题

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?

回答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);

来源：https://stackoverflow.com/questions/36107490/zf2-pass-variable-to-custom-element-from-controller