Question

public function pages($slug, PagesGenerator $pagesGenerator)
{
    $output = $pagesGenerator->getPages($slug);

    $id = $page->getId();

    return $this->render('list.html.twig', [ 'output' => $output,  'id' => $id]);
}

但是我得到了错误：

注意：未定义的变量：页面

Answer 1

public function pages($slug, PagesGenerator $pagesGenerator)
{
    $output = $pagesGenerator->getPages($slug);

    // here is your error: $page is not defined.
    $id = $page->getId();

    // something like this?
    $id = $output['page']->getId();

    return $this->render('list.html.twig', [ 'output' => $output,  'id' => $id]);
}

Answer 2

您的新控制器显然没有将template变量放入变量列表，而只是output。看起来您的正确代码应该是：

  public function pages($slug, PagesGenerator $pagesGenerator)
  {
      $output = $pagesGenerator->getPages($slug);

      return $this->render('list.html.twig', $output);
  }

更新：更新问题的答案基本相同，您需要做的就是将模板变量作为纯数组传递

return $this->render('list.html.twig', array_merge($output, ['table' => $table]));

或根据模板中的实际结构使用它们，例如{{ output.page }}代替{{ page }}

如何访问服务变量？

2 个答案: