twitter-bootstrap – 如何在symfony2中使用assetic和less使用twitter bootstrap？

我的composer.json是：

"require":
    [...]
    "leafo/lessPHP": "dev-master","braincrafted/bootstrap-bundle": "dev-master","twbs/bootstrap": "2.3.*"

我的资产配置是：

# Assetic Configuration
assetic:
    filters:
        lessPHP:
            file: %kernel.root_dir%/../vendor/leafo/lessPHP/lessc.inc.PHP
            apply_to: "\.less$"
        cssrewrite: ~
    assets:
        bootstrap_css:
            inputs:
                - %kernel.root_dir%/../vendor/twbs/bootstrap/less/bootstrap.less
                - %kernel.root_dir%/../vendor/twbs/bootstrap/less/responsive.less
            filters:
                - lessPHP
                - cssrewrite
            output: css/bootstrap.css
        bootstrap_js:
            inputs:
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-transition.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-alert.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-button.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-carousel.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-collapse.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-dropdown.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-modal.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-tooltip.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-popover.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-scrollspy.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-tab.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-typeahead.js
                - %kernel.root_dir%/../vendor/twbs/bootstrap/js/bootstrap-affix.js
            output: js/bootstrap.js

最后:: base.html.twig：

{% block stylesheets %}
    <link rel="stylesheet" href="{{ asset('css/bootstrap.css') }}">
{% endblock %}

{% block javascripts %}
    <script src="{{ asset('js/bootstrap.js') }}"></script>
{% endblock %}

我正在尝试以不同的方式包含js ans css,例如：

{% stylesheets '%kernel.root_dir%/../vendor/twbs/bootstrap/less/bootstrap.less' %}
    <link rel="stylesheet" href="{{ asset_url }}" />
{% endstylesheets %}

要么

{% stylesheets '@bootstrap_css' %}
    <link rel="stylesheet" href="{{ asset_url }}" />
{% endstylesheets %}

但它仍然无法工作,我得到bootstrap.css和bootstrap.js的404错误.

我的配置怎么了？我在Windows 7 64bit上使用wamp服务器.

让它工作的唯一方法是使用cli命令assetic：dump但我认为在开发环境中执行此操作并不正确.