方法redirectToRoute() 可以有render() 之类的参数吗?

问题描述

我需要从 symfony2 访问 twig 中的实体.在控制器内部，我可以执行以下操作:

I need to access an entity in twig from symfony2. Inside the controler, I can do something as:

return $this->render('frontendBundle::carrodecompras.html.twig', array(
        'entity' => $entity
));

然后在 twig 中，我可以使用 entity.name 等访问实体属性.

And then in twig I can access the entity properties with entity.name and such.

我需要完成同样的事情，但使用函数 redirectToRoute()

I need to accomplish the same thing but with the function redirectToRoute()

return $this->redirectToRoute('frontend_carrodecompras', array(
        'entity' => $entity,
));

但它似乎不起作用.

我收到以下错误:

第 32 行的 frontendBundle::carrodecompras.html.twig 中不存在变量实体"

Variable "entity" does not exist in frontendBundle::carrodecompras.html.twig at line 32

我正在使用 Symfony 2.7

I'm using Symfony 2.7

变量 $entity 存在(在我使用 $entity 进行简化的应用程序中它实际上称为 $cortina)，就在 redirectToRoute 函数之前，我这样做是为了测试它

The variable $entity exists (it's actually called $cortina in the app I was using $entity for simplification), just before the redirectToRoute function I did this to test it

echo "<pre>";
var_dump($cortina);
echo "</pre>";

return $this->redirectToRoute('frontend_carrodecompras', array(
                'cortina' => $cortina,
                ));

结果是这样的:

object(dexterackendBundleEntitycortina)#373 (16) {
  ["id":"dexterackendBundleEntitycortina":private]=>
  int(3)
  ...

这是 Twig 代码:

This is the Twig code:

<tr>
    {% set imagentela = "img/telas/" ~ cortina.codInterno ~ ".jpg" %}
    <td><img src="{{ asset(imagentela | lower ) }}" alt="" width="25" height="25">
    </td>
    <td>{{ cortina.nombre }}</td>
    <td>{{ "$" ~ cortina.precio|number_format('0',',','.') }}</td>
</tr>

推荐答案

当你从控制器调用 redirectToRoute($route, array $parameters) 时，$parameters 是用于生成 url 标记，而不是在视图中呈现的变量，这是由分配给您要重定向到的路由的控制器完成的.

When you call redirectToRoute($route, array $parameters) from a controller, $parameters is used to generate the url tokens, not variables to render in view, this is done by the controller assigned to the route you are redirecting to.

示例:

class FirstController extends Controller
{
    /**
     * @Route('/some_path')
     */
    public function someAction()
    {
        // ... some logic
        $entity = 'some_value';

        return $this->redirectToRoute('some_other_route', array('entity' => $entity)); // cast $entity to string
    }
}

class SecondController extends Controller
{
    /**
     * @Route('/some_other_path/{entity}', name="some_other_route")
     */
    public function otherAction($entity)
    {
        // some other logic
        // in this case $entity equals 'some_value'

        $real_entity = $this->get('some_service')->get($entity);

        return $this->render('view', array('twig_entity' => $real_entity));
    }
}

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