如何根据会话中的值使用 Assetic 嵌入样式表

问题描述

我想在 Symfony2 项目的树枝模板中嵌入不同的带有资产的样式表文件.使用的样式表取决于用户的主题设置.

I want to embed different Stylesheet files with assetic in a twig template of a Symfony2 project. The used stylesheet depends on the theme setting of the user.

我用过

{% stylesheets 
        '@CuteFlowCoreBundle/Resources/public/css/application.css'
        '@CuteFlowCoreBundle/Resources/public/css/theme/'~app.session.get('cuteflow_theme')~'/application.css'
%}
    <link rel="stylesheet" href="{{ asset_url }}" type="text/css" media="all" />
{% endstylesheets %}

但这会引发错误:

Unexpected token "operator" of value "~" in "CoreBundle::layout.html.twig"

我也尝试了以下方法.但这也无济于事.

I tried the following too. But this didn't help either.

{% set theme = '@CuteFlowCoreBundle/Resources/public/css/theme/'~app.session.get('cuteflow_theme')~'/application.css' %}
{% stylesheets 
        '@CuteFlowCoreBundle/Resources/public/css/application.css'
        theme
%}
    <link rel="stylesheet" href="{{ asset_url }}" type="text/css" media="all" />
{% endstylesheets %}

知道如何做到这一点吗?

Any ideas how this can be done?

推荐答案

答案很简单:你做不到.

The answer is simple : you cannot do it.

Assetic 将迭代您的模板并从 {% stylesheets %} 块生成每个文件.

Assetic will iterate your templates and generate every files from {% stylesheets %} blocks.

如果您使用变量(例如会话)，Assetic 无法猜测"所有可能的值.

If you use a variable (session for example), Assetic cannot "guess" all possible values.

你有两种可能性:

• 单独的 2 个 CSS 调用(1 个用于普通调用，1 个用于专用主题 CSS)-对我来说更有意义
• 为每个主题创建 1 个 CSS

单独的 2 个 CSS 调用

{% stylesheets "A.css" "B.css" %} ... {% endstylesheets %}
<link rel="stylesheet" href="{{ asset("css/" ~ theme ~ ".css") }}" />

为每个主题创建 1 个 CSS

如果您想为每个可用主题创建一个主题，为了简单起见，您必须手动进行:

If you want to create one theme for each available theme, for keeping it simple, you have to do it manually :

{% if theme == "XXX" %}
  {%stylesheets "A.css" "XXX.css" %} ... {% endstylesheets %}
{% elseif theme == "YYY" %}
  {%stylesheets "A.css" "YYY.css" %} ... {% endstylesheets %}
{% endif %}

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