/**
  * Prepare form
  * 
  * @param Uni_Core_Form $form 
  */
 protected function _prepareForm(Uni_Core_Form $form)
 {
     if (NULL == $this->id) {
         $this->setId(get_class($this));
     }
     $form->setAttrib('id', $this->id);
     $model = Fox::getModel($this->modelKey);
     if ($formData = Fox::getModel('core/session')->getFormData()) {
         Fox::getModel('core/session')->setFormData(NULL);
         $form->setFormData($formData);
     } else {
         if ($model && $model->getId()) {
             $form->setModel($model);
         }
     }
 }