ruby-on-rails-3.2 - Rails 3.2.8 - 路由和 link_to_paths

Question

我正在尝试将我的 3.0 应用程序重构为另一台运行 3.2.8 的服务器，并且看起来路由语法可能有所改变？

鉴于此 routes.rb：

root :to => 'user_sessions#new'
match 'login' => 'user_sessions#new'
match 'logout' => 'user_sessions#destroy'
match 'usermenu' => 'users#menu'
match 'adminmenu' => 'users#adminmenu'

而这个观点：

<% if current_user %>  
  <%= link_to "Logout", logout_path %>  |  
  <%= link_to "Main Menu", usermenu_path %>  |  
  <%= link_to_if (current_user.admin == true, "Admin Menu", adminmenu_path) %>
<% end %>

我收到此错误：

ActionView::Template::Error (/home/-/layouts/application.html.erb:19: syntax error, unexpected ',', expecting ')'
...if (current_user.admin == true, "Admin Menu", adminmenu_path...

/home/-/layouts/application.html.erb:19: syntax error, unexpected ',', expecting ')'
...er.admin == true, "Admin Menu", adminmenu_path) );@output_bu...
                          ^):

Answer 1

link_to_if 和左括号之间不能有空格

link_to_if (current_user.admin == true, "Admin Menu", adminmenu_path)

应该

link_to_if(current_user.admin == true, "Admin Menu", adminmenu_path)

路线没有改变。