ZF2: FieldSet getInputFilterSpecification() gets called twice - php

Question

getInputFilterSpecification() read twice for a fieldset when used with fileprg Controller plugin.
Basically I have a simple form with a single fieldset:
The Form:
class CreateEditReward extends ProvideEventsForm
{
public function __construct($name = null, $options = array())
{
parent::__construct($name ?: 'Reward', $options);
$this->add(array(
'name' => 'submit',
'type' => 'submit'
));
$this->add(array(
'name' => 'cancel',
'type' => 'button'
));
}
public function init()
{
parent::init();
$this->add(array(
'name' => 'reward',
'type' => 'MyAchievement\Form\RewardFieldset',
'options' => array(
'use_as_base_fieldset' => true
)
));
if (($listener = $this->get('reward')) instanceof ListenerAggregateInterface) {
/** #var $listener ListenerAggregateInterface */
$this->getEventManager()->attachAggregate($listener);
}
}
}
The form extends the most basic EventsCapable implmentation and is not related to the problem.
The Fieldset:
class RewardFieldset extends Fieldset implements
InputFilterProviderInterface,
ListenerAggregateInterface
{
/**
* #var RewardService
*/
protected $rewardService;
/**
* #var WebPathResolver
*/
protected $webPathResolver;
protected $listeners = array();
public function __construct(RewardService $rewardService, WebPathResolver $webPathResolver, $name = null, $options = array())
{
parent::__construct($name ?: 'Reward', $options);
$this->rewardService = $rewardService;
$this->webPathResolver = $webPathResolver;
//...
$this->add(array(
'name' => 'thumb',
'type' => 'file',
'options' => array(
'label' => 'Thumb'
),
'attributes' => array(
'id' => 'thumb',
'data-rel' => null
)
));
// .. more elts
}
/**
* Should return an array specification compatible with
* {#link Zend\InputFilter\Factory::createInputFilter()}.
*
* #return array
*/
public function getInputFilterSpecification()
{
return array(
// ... other elts input filters
'thumb' => array(
'required' => false,
'filters' => array(
array(
'name' => 'fileRenameUpload',
'options' => array(
'target' => './data/upload',
'overwrite' => true,
'randomize' => true,
'use_upload_name' => true
)
)
),
'validators' => array(
array(
'name' => 'fileMimeType',
'options' => array(
'image',
'enableHeaderCheck' => true
)
)
)
)
);
}
public function addThumbPreview(FormEvent $e)
{
/** #var $object Reward */
if (! ($object = $e->getObject()) instanceof Reward) {
return;
}
if ($object->getThumb()) {
$this->get('thumb')
->setAttribute('data-rel', $this->webPathResolver->getPath($object, $object->getThumb()));
}
}
/**
* Attach one or more listeners
*
* Implementors may add an optional $priority argument; the Eve\ntManager
* implementation will pass this to the aggregate.
*
* #param EventManagerInterface $events
*
* #return void
*/
public function attach(EventManagerInterface $events)
{
$this->listeners[] = $events->attach(FormEvent::EVENT_POST_BIND, array($this, 'addThumbPreview'));
}
/**
* Detach all previously attached listeners
*
* #param EventManagerInterface $events
*
* #return void
*/
public function detach(EventManagerInterface $events)
{
foreach ($this->listeners as $i => $listener) {
if ($events->detach($listener)) {
unset($this->listeners[$i]);
}
}
}
}
My controller's edit action:
public function editAction()
{
/** #var $request Request */
$request = $this->getRequest();
$back = $request->getQuery('back', $this->url()->fromRoute('admin/reward'));
/** #var $reward Reward */
if (null === $reward = $this->rewardService->fetchById($id = $this->params()->fromRoute('id'))) {
return $this->redirect()->toUrl($back);
}
$form = $this->getCreateEditForm();
$form->bind($reward);
if (($prg = $this->fileprg($form)) instanceof ResponseInterface) {
return $prg;
}
if (is_array($prg)) {
try {
if ($form->isValid()) {
$this->rewardService->updateReward($reward);
$this->flashMessenger()->addSuccessMessage('Changes saved');
$this->redirect()->toRoute('admin/reward',
array('action' => 'edit', 'id' => $id),
array('query' => array('back' => $back)));
} else {
/** #var $rewardFieldset FieldsetInterface */
$rewardFieldset = $form->get('reward');
/** #var $thumbElt ElementInterface */
$thumbElt = $rewardFieldset->get('thumb');
if (! $thumbElt->getMessages()) {
$reward->setThumb($thumbElt->getValue());
$this->rewardService->updateReward($reward);
}
}
} catch (\Exception $e) {
$this->flashMessenger()->addErrorMessage('Changes could not be saved');
return $this->redirect()->toUrl($back);
}
}
return new ViewModel(array(
'form' => $form,
'reward' => $reward,
'back' => $back
));
}
My module conf for the form:
/**
* Expected to return \Zend\ServiceManager\Config object or array to
* seed such an object.
*
* #return array|\Zend\ServiceManager\Config
*/
public function getFormElementConfig()
{
return array(
'invokables' => array(
'MyAchievement\Form\CreateEditReward' => 'MyAchievement\Form\CreateEditReward',
),
'factories' => array(
'MyAchievement\Form\RewardFieldset' => function (FormElementManager $fm) {
/** #var $rewardService RewardService */
$rewardService = $fm->getServiceLocator()->get('MyAchievement\Service\Reward');
/** #var $webPathResolver WebPathResolver */
$webPathResolver = $fm->getServiceLocator()->get('Application\Service\WebPathResolver');
$fieldset = new RewardFieldset($rewardService, $webPathResolver);
$fieldset->setHydrator(new ClassMethods());
return $fieldset;
}
)
);
}
The problem is the getInputFilterSpecifications() is called twice, thus everytime I try to upload a picture with my form I get
Zend\Filter\Exception\RuntimeException:
File './data/upload/my-thumb_5249d42bd582b.jpg' could not be renamed. An error occurred while processing the file.
That is because my filters run twice on the same thumbnail, the first time it is successful (I can even see the file uploaded to the temp dir).
Thanks.