方法redirectToRoute（）可以具有render（）之类的参数吗？ [英] Can the method redirectToRoute() have arguments like render()?

问题描述

我需要从symfony2访问树枝中的实体。
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
));

然后在树枝中，我可以使用 entity.name 等。

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

我需要完成相同的操作，但要使用功能 redirectToRoute（）

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

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

但这似乎不起作用。

我遇到以下错误：

frontendBundle :: carrodecompras中不存在可变的实体 .html.twig在第32行

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

编辑：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，实际上称为$ cortina），就在redirectToRoute函数执行此操作之前进行了测试

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(dexter\backendBundle\Entity\cortina)#373 (16) {
  ["id":"dexter\backendBundle\Entity\cortina":private]=>
  int(3)
  ...

这是Twig代码：

<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

调用 redirectToRoute（ $ route，array $ parameters）来自控制器， $ parameters 用于生成url令牌，而不是要在视图中呈现的变量，这是

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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