Symfony如何使用PHP和twig创建可重用的小部件

Question

假设我在网站上的多个地方都有评论.我怎样才能创建像{{render_widget('comments',{"object":object})}}这样的东西？这会使表单和列表包含该对象的所有注释吗？

Answer 1

创建服务:

// src/Acme/HelloBundle/Service/Widget.php
namespace Acme\HelloBundle\Service;

use Symfony\Component\DependencyInjection\ContainerInterface;

class Widget
{
    protected $container;

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

    public function getComments()
    {
        $request = $this->container->get('request'); // use service_container to access request, doctrine, twig, etc...
    }
}

申报服务:

# src/Acme/HelloBundle/Resources/config/services.yml
parameters:
    # ...
    my_widget.class: Acme\HelloBundle\Service\Widget

services:
    my_widget:
        class:     "%my_widget.class%"
        arguments: ["@service_container"]
        # scope: container can be omitted as it is the default

在控制器中使用服务:

namespace Acme\HelloBundle\Controller;

class BlogController {

    public function getPostAction($id) {
        // get post from db
        $widget = $this->get('my_widget'); // get your widget in controller
        $comments = $widget->getComments(); // do something with comments

        return $this->render('AcmeHelloBundle:Blog:index.html.twig',
            array('widget' => $widget) // pass widget to twig
        );
    }
}

或者在树枝上,如果您在render()功能中传递上述模板中的服务:

#AcmeHelloBundle:Blog:index.html.twig

{{ widget.getComments()|raw }}

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