forms - 使用获取数据来预填表单

Question

我想在 symfony2 中预填表单域。网址看起来像这样

http://localhost/Symfony/web/app_dev.php/clearance/new?projectId=6

我现在想将表单中的 projectId 设置为 6。

这是我的 Controller 代码

 public function newclearanceAction(){
    $request = $this->getRequest();
    $id = $request->query->get('projectId');

    echo $id; //this works, but how to send it to the form?????

    $clearance = new Clearance();
    $form = $this->createForm(new ClearanceType(), $clearance);

    if ($request->getMethod() == 'POST'){
            $form->bindRequest($request);

            if($form->isValid()) {
                    $em = $this->getDoctrine()->getEntityManager();
                    $em->persist($clearance);
                    $em->flush();
                    return $this->redirect($this->generateUrl('MyReportBundle_project_list'));
            }
    }
    return $this->render('MyReportBundle:Clearance:new.html.twig',array('form'=>$form->createView()));

这是表单 View 的代码

<form action="{{ path('MyReportBundle_clearance_new') }}" method="post" >
        {{ form_errors(form) }}
        {{ form_rest(form) }}
    <input type="submit" />
</form>

谢谢你的帮助!

Answer 1

这取决于您的清关实体是否有与之相关的项目。如果是这样，您可以执行以下操作:

$request = $this->getRequest();
$id = $request->query->get('projectId');
$em = $this->getDoctrine()->getEntityManager();
$project = $em->getRepository("MyReportBundle:Project")->find($id)
$clearance = new Clearance();
$clearance->setProject($project);
$form = $this->createForm(new ClearanceType(), $clearance);

这将在清除对象上设置项目并将其传递给表单。

目前，您无法在 Symfony2 中为实体创建隐藏字段，因此我当前的解决方法是创建一个查询构建器实例并将其传递给表单，这样当您拥有 100 个项目时，项目的表单选择不会变得荒谬。要在我添加的操作中执行此操作:

$request = $this->getRequest();
$id = $request->query->get('projectId');
$em = $this->getDoctrine()->getEntityManager();

$repo = $em->getRepository("MyReportBundle:Project");
$project = $repo->find($id)
//create the query builder
$query_builder = $repo->createQueryBuilder('p')
     ->where('p.id = :id')
     ->setParameter('id', $project->getId());

$clearance = new Clearance();
$clearance->setProject($project);
//pass it through
$form = $this->createForm(new ClearanceType($query_builder), $clearance);

并在表单类中:

protected $query_builder;

public function __construct($query_builder)
{
    $this->query_builder = $query_builder;
}

public function buildForm(FormBuilder $builder, array $options)
{
    $builder
        ->add('Your field')
        // all other fields
        // Then below the query builder to limit to one project
        ->add('project', 'entity', array(
            'class' => 'MyReportBundle:Project',
            'query_builder' => $this->query_builder
        ))
    ;
}