我目前正在使用symfony2开发并使用FOSUserBundle进行用户管理。
我构建了一个menus.yml配置文件,用于将html与菜单结构分开。 Basicaly我在config.yml文件中导入menus.yml,它被添加到twig的全局变量中。这是我的menus.yml(Abridged版本)
twig:
globals:
menus:
loggedin:
topleft:
-
path: ~
caption: Réseau
icon: glyphicon-comment
submenu:
-
path: nouvelles
caption: Fil de nouvelles
icon: glyphicon-globe
topright:
-
path: ~
caption: "{{ app.user.prenom }} {{ app.user.nom }}"
icon: glyphicon-user
然后,在我的模板html文件中,我使用此
呈现菜单{% for m in menus.loggedin.topleft %}
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">{{ m.caption }}</a>
<ul class="dropdown-menu">
{% for item in m.submenu %}
<li><a href="#">{{item.caption}}</a></li>
{% if item.seperator is defined and item.seperator == true %}
<li class="divider"></li>
{% endif %}
{% endfor %}
</ul>
</li>
{% endfor %}
但我无法显示用户的名字和姓氏,因为文本值按原样打印到html页面中。我尝试将app.user挂钩到这样的标题
caption: %app.user.prenom% %app.user.nom%
但它没有用,说价值不存在(还有?)
任何人都知道如何解决这个问题?
答案 0 :(得分:2)
我在Twig中寻找了等效的eval()
PHP或Javascript函数,并发现了这个问题:Twig variables in twig variable。
以下是定义Twig过滤器的answer by Berry Langerak代码:
<?php
/**
* A twig extension that will add an "evaluate" filter, for dynamic evaluation.
*/
class EvaluateExtension extends \Twig_Extension {
/**
* Attaches the innervars filter to the Twig Environment.
*
* @return array
*/
public function getFilters( ) {
return array(
'evaluate' => new \Twig_Filter_Method( $this, 'evaluate', array(
'needs_environment' => true,
'needs_context' => true,
'is_safe' => array(
'evaluate' => true
)
))
);
}
/**
* This function will evaluate $string through the $environment, and return its results.
*
* @param array $context
* @param string $string
*/
public function evaluate( \Twig_Environment $environment, $context, $string ) {
$loader = $environment->getLoader( );
$parsed = $this->parseString( $environment, $context, $string );
$environment->setLoader( $loader );
return $parsed;
}
/**
* Sets the parser for the environment to Twig_Loader_String, and parsed the string $string.
*
* @param \Twig_Environment $environment
* @param array $context
* @param string $string
* @return string
*/
protected function parseString( \Twig_Environment $environment, $context, $string ) {
$environment->setLoader( new \Twig_Loader_String( ) );
return $environment->render( $string, $context );
}
/**
* Returns the name of this extension.
*
* @return string
*/
public function getName( ) {
return 'evaluate';
}
}
使用示例:
$twig_environment->addExtension( new EvaluateExtension( ) );
在模板中使用它:
{% set var = 'inner variable' %}
{{'this is a string with an {{var}}'|evaluate}}