Zend Framework 3 Redirect from factory - zend-framework3

Question

My Controller has a Factory that gives it a Form
$formManager = $container->get('FormElementManager');
return new MyController(
$formManager->get(MyForm::class)
);
My Form has also a Factory that gives it an AuthenticationService
return new MyForm(
$container->get(AuthenticationService::class)
);
That way I can check in the form if the user has identity.
But how can i redirect him from the form?
Just like in a Controller?
if(!$authService->hasIdentity()) {
return $this->redirect()->toRoute('myRoute);
}
Or how can i redirect from a (Controller and/or Form) Factory?

Answer 1

A possible solution for your issue could be the possibilty of using the build method with the factory call.
You haven 't shown your factories, so I will use some standard examples, which explain the solution.
The first approach is not injecting the whole form to the controller. Instead just inject the form element manager. So you can use the build method of the factory inside your controller.
The controller factory
namespace Application\Controller\Factory;
use Application\Controller\YourController;
use Interop\Container\ContainerInterface;
use Zend\ServiceManager\Factory\FactoryInterface;
class YourControllerFactory implements FactoryInterface
{
public function __invoke(ContainerInterface $container, $requestedName, array $options = null)
{
$formElementManager = $container->get('FormElementManager');
return new YourController($formElementManager);
}
}
This differs from your original factory. Only the form element manager is injected to the controller. This holds a few advantages for you. One of this is the build method of the manager.
The Controller
namespace Application\Controller;
class YourController extends AbstractActionController
{
protected $formElementManager;
public function __construct($formElementManager)
{
$this->formElementManager = $formElementManager;
}
public function indexAction()
{
$user = $this->currentUser();
if ($user === null) {
$this->redirect('to/somewhere/the/user/belongs');
}
// here 's the magic!
$form = $this->formElementManager->build(YourForm::class, [
'userID' => $user->getUserId(),
]);
// some form stuff follows here
}
}
As the form was not injected directly to your controller but the form element manager, you can use the form element manager instead inside the controller. This offers you the opportunity to use the build function. With this function you can add some options to your form factory. In this case I 'm using the user id for the form factory.
If there 's no valid user, no form will be created because an exception is thrown before.
The Form Factory
The form factory creates a new instance of your form. All needed dependencies should be created in the factory. How the build function works here, I 'll explain later in the answer.
namespace Application\Form\Factory;
use Application\Form\YourForm;
use Interop\Container\ContainerInterface;
use Zend\ServiceManager\Factory\FactoryInterface;
class YourFormFactory implements FactoryInterface
{
public function __invoke(ContainerInterface $container, $requestedName, array $options = null)
{
$selectOptions = [];
if ($options !== null) {
if (isset($options['userID])) {
$tablegateway = $container->get(YourTableGateway::class);
$selectOptions = $tablegateway->findOptionsByUserId($options['userID]);
}
}
$form = $container->get(YourForm::class);
if (count($selectOptions))
$form->get('YourSelectElement')->setValueOptions($selectOptions);
return $form;
}
}
This factory does all you need. Via the build method you hand over the user id. If a user id is present a table gateway is created from wich you retrieve select options by the given user id. These options will be set to the form field. This logic is kept in the factory to keep the form class itself clean and simple.
With this solution you don 't need the auth service in your form. Your form is only generated when a valid user id is given. Your form instance will not crash, if there 's no user id given. The only conceivable case could be a form with default or no select options for the specific field.
Hope this helps a bit.