How to create fieldset collection using form factory in zf2 - php

Question

I'm trying to create a form that contains a collection of fieldsets using only array specs and Zend\Form\Factory.
Here is how I create the form using the factory:
$factory = new Zend\Form\Factory();
$fieldset = $factory->createFieldset(array(
'elements' => array(
array(
'spec' => array(
'name' => 'name',
'type' => 'Text',
'attributes' => array(
'class' => 'form-control input-sm',
),
'options' => array(
'label' => 'Name',
),
),
),
array(
'spec' => array(
'name' => 'driverClass',
'type' => 'Text',
'attributes' => array(
'class' => 'form-control input-sm',
),
'options' => array(
'label' => 'Driver',
),
),
),
),
'input_filter' => array(
'name' => array(
'required' => true,
),
),
));
$form = $factory->createForm(array(
'name' => 'application-form',
'attributes' => array(
'role' => 'form',
),
'elements' => array(
array(
'spec' => array(
'type' => 'Collection',
'name' => 'connection',
'options' => array(
'label' => 'Connections',
'allow_add' => true,
'allow_remove' => true,
'should_create_template' => true,
'count' => 2,
'target_element' => $fieldset,
),
),
),
array(
'spec' => array(
'name' => 'security',
'type' => 'Csrf',
'attributes' => array(
'required' => 'required',
),
),
),
array(
'spec' => array(
'name' => 'submit',
'type' => 'Submit',
'attributes' => array(
'class' => 'btn btn-sm btn-primary',
),
'options' => array(
'label' => 'Apply',
),
),
),
),
));
The resulting form works fine when I try to set data and render form elements. But when I validate it and retrieve data, like so (in a controller):
$form->setData($this->getRequest()->getPost());
if ($form->isValid() === true) {
$data = $form->getData();
var_dump($this->getRequest()->getPost());
var_dump($data);
}
With this set of data as POST:
object(Zend\Stdlib\Parameters)[141]
private 'storage' (ArrayObject) =>
array (size=3)
'connection' =>
array (size=2)
0 =>
array (size=2)
'name' => string 'orm_default' (length=11)
'driverClass' => string 'Doctrine\DBAL\Driver\PDOMySql\Driver' (length=36)
1 =>
array (size=2)
'name' => string 'blog' (length=4)
'driverClass' => string 'Doctrine\DBAL\Driver\PDOMySql\Driver' (length=36)
'submit' => string '' (length=0)
'security' => string '20d5c146d8874dc804948e962d5de91b-87c9e4097f9140d259efb5c589a05d6b' (length=65)
The array returned by the call to $form->getData() shows an empty collection:
array (size=3)
'security' => string '20d5c146d8874dc804948e962d5de91b-87c9e4097f9140d259efb5c589a05d6b' (length=65)
'submit' => string '' (length=0)
'connection' =>
array (size=0)
empty
What am I missing?
The expected result is a collection, named 'connection' in this example, containing two arrays representing the two fieldsets as specified by the POST data. I have a feeling this has to do with a missing InputFilter (or at least its specs) because I have managed to obtain the expected result when I implement a fieldset class that extends Zend\Form\Fieldset and implements Zend\InputFilter\InputFilterProviderInterface.

Answer 1

Just discovered this class Zend\Form\InputFilterProviderFieldset which does exactly what I missed.
I added a type in the fieldset specs and changed the input filter specs (which is mandatory) like so:
$fieldset = $factory->createFieldset(array(
'type' => 'Zend\Form\InputFilterProviderFieldset',
'elements' => array(
array(
'spec' => array(
'name' => 'name',
'type' => 'Text',
'attributes' => array(
'class' => 'form-control input-sm',
),
'options' => array(
'label' => 'Name',
),
),
),
array(
'spec' => array(
'name' => 'driverClass',
'type' => 'Text',
'attributes' => array(
'class' => 'form-control input-sm',
),
'options' => array(
'label' => 'Driver',
),
),
),
),
'options' => array(
'input_filter_spec' => array(
'name' => array(
'required' => true,
),
),
),
));
And it works fine now. Hope this helped someone.