解决方法
我为css命名空间做了类似的事情：
- # config/initializers/action_view.rb
- ActionView::TemplateRenderer.class_eval do
- def render_template_with_tracking(template,layout_name = nil,locals = {})
- # with this gsub,we convert a file path /folder1/folder2/subfolder/filename.html.erb to subfolder-filename
- @view.instance_variable_set(:@_rendered_template,template.inspect.gsub(/(\..*)/,'').split('/')[-2..-1].join('-'))
- out = render_template_without_tracking(template,layout_name,locals)
- @view.instance_variable_set(:@_rendered_template,nil)
- return out
- end
- alias_method_chain :render_template,:tracking
- end
- # application.html.erb
- <body class="<%= :@_rendered_template %>" >