我有一个Symfony2应用程序,其中包含一个文件类型字段的表单.我需要在那里上传一个学生的图像,所以我帮助了这个文档：
How to Upload Files
这是我的代码：
控制器：
public function createAction(Request $request)
{
if ($request->isXmlHttpRequest() && !$request->isMethod('POST')) {
throw new HttpException('XMLHttpRequests/AJAX calls must be POSTed');
}
$entity = new Student();
$form = $this->createCreateForm($entity);
$form->handleRequest($request);
if ($form->isValid()) {
$file = $entity->getPhoto();
$fileName = md5(uniqid()).'.'.$file->guessExtension();
$photoDir = $this->container->getParameter('kernel.root_dir').'/../web/uploads/images';
$file->move($photoDir,$fileName);
$entity->setPhoto($fileName);
$em = $this->getDoctrine()->getManager();
$em->persist($entity);
$em->flush();
if ($request->isXmlHttpRequest()) {
return new JsonResponse(array('message' => 'Success!','success' => true),200);
}
if ($request->isMethod('POST')) {
return new JsonResponse(array('message' => 'Invalid form','success' => false),400);
}
return $this->redirect($this->generateUrl('student_show',array('id' => $entity->getId())));
}
return $this->render('BackendBundle:Student:new.html.twig',array(
'entity' => $entity,'form' => $form->createView(),));
}
实体：
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
//...
/**
* @var string
*
* @ORM\Column(name="photo",type="string",length=255,nullable=true)
*
*/
private $photo;
public function setPhoto($photo)
{
$this->photo = $photo;
return $this;
}
public function getPhoto()
{
return $this->photo;
}
formtype：
//...
->add('photo','file',array('required' => false))
//...
使用Javascript：
//...
$('.form_student').on("submit",function(event) {
event.preventDefault();
$.ajax({
type: 'POST',url: Routing.generate('student_create'),data: $(this).serialize(),dataType: 'json',success: function(response) {
alert(response.message);
},error: function (response,desc,err){
if (response.responseJSON && response.responseJSON.message) {
alert(response.responseJSON.message);
}
else{
alert(desc);
}
}
});
});
我现在遇到的问题是我必须使用Ajax请求,但不知道如何发送该文件字段,然后可以在Symfony控制器中使用它.
我见过一些FormData(),但不知道它是如何使用的.
你可以帮帮我吗？
