我创建了一个半静态页面,我想将其添加到application.html.erb文件中的菜单中,并通过部分调用所有视图,但它只能在页面中使用。
用户索引错误
You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.each
Extracted source (around line #1):
1: <% @pages.each do |page| %>
2: <li><%=link_to page.name, page.name %></li>
3: <% end %>
的routes.rb
Vgrant::Application.routes.draw do
resources :pages
get "user_sessions/new"
root :to => "Pages#index"
resources :users
resources :user_sessions
match 'login' => "user_sessions#new", :as => :login
match 'logout' => "user_sessions#destroy", :as => :logout
match ':name', :controller => 'pages', :action => 'show'
end
application.html.erb
<%= render :partial => "pages/menu" %>
页/ _menu.html.erb
<% @pages.each do |page| %>
<li><%=link_to page.name, page.name %></li>
<% end %>
Rails -v 3.0.7
我已经尝试过一些东西,但是这里仍然存在问题,一段时间没有在rails项目上工作,我生锈了!
提前感谢您的帮助!
答案 0 :(得分:2)
@pages未初始化。由于您是在应用程序布局中访问它,我建议您在application_controller.rb中定义一个before_filter来初始化此@pages数组。