zf2表单验证(与zfcAdmin和BjyAuthorize相关)

我正面临在zfcAdmin和BjyAuthorize中集成自定义模块的验证问题。

我的表单类:

...    
$formOptions = $this->settings->getFormSettings();
foreach ($formOptions as $field){
if (isset($field['field']))
    $this->add($field['field']);        
}
...

我的过滤器类:

$formOptions = $this->settings->getFormSettings();
foreach ($formOptions as $filter){
if (isset($filter['filter']))
    $this->add($filter['filter']);   
}
...

字段、过滤器和其他选项从配置文件中检索。

基本上一切都很好:表单数据可以从数据库中添加，编辑或删除。zfcAdmin模块安装后也没有出现问题。使用'site/mymodule'路由和'site/admin/mymodule'路由，一切都很好:我仍然可以添加，编辑和删除db中的项目。

这里的问题:我需要一些表单元素(一个选择在这种特殊情况下)编辑/只能由管理员查看。(我可以为管理员写一个新的控制器/实体类'特设'，但我想为整个网站使用相同的代码。)

我安装并配置了bjyoungblood/BjyAuthorize模块:它允许我显示一些表单元素/字段只管理，但当我在编辑模式一个表单验证错误显示:"值是必需的，不能为空"

代码如下:

//view/mymodule/mymodule/update.phtml
<div id="page" style="margin-top: 50px;">
<?php if (isset($this->messages) && count($this->messages) > 0 ): ?>
<?php foreach ($this->messages as $msg): ?>
<div class="alert alert-<?php echo $this->escapeHtmlAttr($msg['type']); ?>">
    <?php if (isset($msg['icon'])) echo '<i class="'.$this->escapeHtmlAttr($msg['icon']).'"></i>&nbsp;'; ?><?php echo $this->escapeHtml($msg['message']); ?>
</div>
<?php endforeach; ?>
<?php endif; ?>
<?php
$title = 'Edit Item';
$this->headTitle($title);
?>
<h1><?php echo $this->escapeHtml($title); ?></h1>
<?php
$form = $this->form;
$form->setAttribute('action', $this->url($this->route . 'mymodule/update', array('action' => 'update', 'id' => $this->id )));
$form->prepare();
$form->setAttribute('method', 'post');
$input = $form->getInputFilter();
?>
<?php echo $this->form()->openTag($form) ?>
<dl class="zend_form">
    <?php foreach ($form as $element): ?>
        <?php
            //CHECK USER PRIVILEDGES
            $elName = $element->getName();
            $elResource = isset($this->form_options[$elName]['auth']) ? $this->form_options[$elName]['auth']['resource'] : "userresource"; 
            $elPrivilege = isset($this->form_options[$elName]['auth']) ? $this->form_options[$elName]['auth']['privilege'] : "view";
            //SHOW THE ELEMENT IF ALLOWED
            if($this->isAllowed($elResource, $elPrivilege)): 
        ?>
            <?php if ($element->getLabel() != null): ?>
                <dt><?php echo $this->formLabel($element) ?></dt>
                <?php endif ?>
            <?php if ($element instanceof Zend'Form'Element'Button): ?>
                <dd><?php echo $this->formButton($element) ?></dd>
                <?php elseif ($element instanceof Zend'Form'Element'Select): ?>
                <dd><?php echo $this->formSelect($element) . $this->formElementErrors($element) ?></dd>
                <?php else: ?>
                <dd><?php echo $this->formInput($element) . $this->formElementErrors($element) ?></dd>
                <?php endif ?>
           <?php else: ?>
           <?php        
           ?>          
        <?php endif ?> 
    <?php endforeach ?>
</dl>
<?php echo $this->form()->closeTag() ?>

</div>
<div class="clear-both"></div>

我的控制器动作

//controller
        public function updateAction(){
            $messages = array();
            $id = (int)$this->getEvent()->getRouteMatch()->getParam('id');
            $form = $this->getServiceLocator()->get('FormItemService');
            $itemMapper = $this->getItemMapper();
            $item = $itemMapper->findById($id);
            $form->bind($item);
            $request = $this->getRequest();
            if($request->isPost()){
                $form->setData($request->getPost());
                if ($form->isValid()) {             
                    die('c');//never here
                    $service = $this->getServiceLocator()->get('mymodule'Service'Item');
                    if ( $service->save($form->getData()) )
                    {
                        $messages[] = array(
                                'type'    => 'success',
                                'icon'    => 'icon-ok-sign',
                                'message' => 'Your profile has been updated successfully!',
                        );
                    }
                    else
                    {
                        $messages[] = array(
                                'type'    => 'error',
                                'icon'    => 'icon-remove-sign',
                                'message' => 'Profile update failed!  See error messages below for more details.',
                        );
                    }
                }else{
                    var_dump($form->getMessages());//Value is required and can't be empty
                }
            }
            return array(
                'messages' => $messages,    
                'form' => $form,
                'id' => $id,    
                'form_options' => $this->getServiceLocator()->get('mymodule_module_options')->getFormSettings(),
                'route' => $this->checkRoute($this->getEvent()->getRouteMatch()->getmatchedRouteName())
            );
        }

如果不允许用户查看资源，则不回显该元素。因此$request->getPost()对于该表单元素没有值，并且由isValid()返回错误。

有没有人解决过类似的问题或者有人能给我指出正确的方向吗?由于