การอัพโหลดไฟล์ with Zend Framework Code ผู้รู้ช่วยด้วยค่ะ

    function uploadAction()
    {
		$this->_helper->layout()->setLayout('layoutoff'); // set layout    	
    	$form = new Form_UploadForm();
 		$doc = new Model_Documents();
 		$this->view->form = $form;

 		if ($this->getRequest()->isPost()) {
 			$formData = $this->_request->getPost();
	
 			//Zend_Debug::dump($form->getValues()); //--> Dump ดูข้อมูล
 			if ($form->isValid($formData)) {
 				
 				$upload = new Zend_File_Transfer_Adapter_Http();
 				$upload->addValidator('Size', false, 20000, 'file');
 				$upload->setDestination(APPLICATION_PATH . '/../public/uploadfile');
 				$files = $upload->getFileInfo();
 			Zend_Debug::dump($files);
 				$upload->receive();
 		$doc->insert($form->getValues());
 		
		//return $this->_helper->redirector('index');
				}

			}
    	
    }