twig 继承和 symfony2 控制器变量

Question

我正在使用 symfony2 + twig 尝试我的第一个项目。我创建了带有定义块的基本树枝模板。基本上是这样的

{% block content %}
  some content...
{% endblock %}

{% block footer %}
  {{ footer.content}}
{% endblock %}

我希望所有页面的页脚都相同。页脚从数据库加载，并在控制器中设置。我想从上述模板继承到其他页面，但我必须始终在控制器中设置页脚，否则未定义变量。

我的问题是是否存在任何'nice'如何为从父模板继承的多个模板设置页脚变量的方法？

Answer 1

解决方案：Embedding Controllers

In some cases, you need to do more than include a simple template. Suppose you have a sidebar in your layout that contains the three most recent articles. Retrieving the three articles may include querying the database or performing other heavy logic that can't be done from within a template.

The solution is to simply embed the result of an entire controller from your template. First, create a controller that renders a certain number of recent articles:

控制器

// src/AppBundle/Controller/ArticleController.php
namespace AppBundle\Controller;
// ...

class ArticleController extends Controller
{
    public function recentArticlesAction($max = 3)
    {
        // make a database call or other logic
        // to get the "$max" most recent articles
        $articles = ...;

        return $this->render(
            'article/recent_list.html.twig',
            array('articles' => $articles)
        );
    }
}

查看

{# app/Resources/views/article/recent_list.html.twig #}
{% for article in articles %}
    <a href="/article/{{ article.slug }}">
        {{ article.title }}
    </a>
{% endfor %}

布局

{# app/Resources/views/base.html.twig #}

{# ... #}
<div id="sidebar">
    {{ render(controller(
        'AppBundle:Article:recentArticles',
        { 'max': 3 }
    )) }}
</div>

Answer 2

您可以使用以下方法之一，'write a custom Twig Extension'

<?php

namespace AppBundle\Extension;

class MyTwigExtension extends \Twig_Extension
{
    private $em;
    private $conn;

    public function __construct(\Doctrine\ORM\EntityManager $em) {
        $this->em = $em;
        $this->conn = $em->getConnection();
    }

    public function getFunctions()
    {
        return array(
            'users' => new \Twig_Function_Method($this, 'getUsers'),
        );
    }

    public function getUsers()
    {
        $sql = "SELECT * FROM users ORDER BY accountname";
        return $this->conn->fetchAll($sql);
    }

    public function getName()
    {
        return 'smproc4_twig_extension';
    }
}

将扩展程序注册为服务

services:
    my.twig.extension:
        class: AppBundle\Extension\MyTwigExtension
        tags:
            - { name: twig.extension }
        arguments:
            em: "@doctrine.orm.entity_manager"

使用自定义扩展

Hello {{ name }}!
<ul>
{% for user in users() %}
    <li>{{ user.accountname }}</li>
{% endfor %}
</ul>

看看

How to Write a custom Twig Extension

Creating an Extension

twig 继承和 symfony2 控制器变量

twig inheritance and symfony2 controller variables

inheritance

symfony

twig