ruby-on-rails - 混合使用 ERB 和 Rails 路径助手编译 YAML

Question

我正在我的应用程序中开发一个导航助手，它从 YAML 文件编译当前命名空间/ Controller 的页面导航。我的 YAML 是这样的:

---
manage:
  - link: <%= manage_clients_path %>
    icon: torsos-all
    label: Clients
  - link: <%= manage_users_path %>
    icon: torso
    label: Users

在我的助手中，我经历了几次迭代，但现在我使用的是这段代码:

require 'yaml'
require 'erb'
module NavigationHelper
  include Rails.application.routes.url_helpers

  def navigation
    unless current_user.nil?
      namepsace = params[:controller].split('/').first
      compiledNav = ERB.new File.read(File.join Rails.root, 'config/navigation.yml')
      nav = YAML.load compiledNav.result
      if nav.has_key?(namepsace) && !nav[namespace].blank?
        nav[namepsace]
      else
        []
      end
    end
  end
end

现在，我收到一个错误，指出 manage_clients_path 未定义(undefined local variable or method manage_clients_path' for main:Object ), but I can guarentee that it does exist by running rake routes`。

来自 rake routes

$ ./bin/spring rake routes | grep manage_clients
manage_clients    GET    /manage/clients(.:format)    manage/clients#index     

Answer 1

问题似乎是由我使用 HAML 构建 View 和布局引起的。我将代码更改为以下内容，一切正常:

YAML 配置:

---
manage:
  - link: #{manage_clients_path}
    icon: torsos-all
    label: Clients
  - link: #{manage_users_path}
    icon: torso
    label: Users

还有我的 helper :

require 'yaml'

module NavigationHelper
  def navigation
    unless current_user.nil?
      namepsace = params[:controller].split('/').first
      nav = YAML.load_file File.join(Rails.root, 'config/navigation.yml')
      if nav.has_key?(namepsace) && !nav[namespace].blank?
        nav[namepsace]
      else
        []
      end
    end
  end
end

现在一切正常。