我已经安装了设计。
我有一个链接：<%= link_to "Sign up", new_user_registration_path %>
当我安装ActiveAdmin（对于现有模型User）时，此链接停止工作：
undefined local variable or method `new_user_registration_path'
我使用 git diff 表示routes.rb，这里是（添加的行是黑色的）：
ActiveAdmin.routes(self) devise_for :users , ActiveAdmin::Devise.config
现在<%= link_to "Sign out", destroy_user_session_path, :method => :delete %>也会导致/admin/logout
如何解决这个问题？
耙子路线：
admin_dashboard /admin(.:format) {:action=>"index", :controller=>"admin/dashboard"}
admin_codes GET /admin/codes(.:format) {:action=>"index", :controller=>"admin/codes"}
POST /admin/codes(.:format) {:action=>"create", :controller=>"admin/codes"}
new_admin_code GET /admin/codes/new(.:format) {:action=>"new", :controller=>"admin/codes"}
edit_admin_code GET /admin/codes/:id/edit(.:format) {:action=>"edit", :controller=>"admin/codes"}
admin_code GET /admin/codes/:id(.:format) {:action=>"show", :controller=>"admin/codes"}
PUT /admin/codes/:id(.:format) {:action=>"update", :controller=>"admin/codes"}
DELETE /admin/codes/:id(.:format) {:action=>"destroy", :controller=>"admin/codes"}
admin_users GET /admin/users(.:format) {:action=>"index", :controller=>"admin/users"}
POST /admin/users(.:format) {:action=>"create", :controller=>"admin/users"}
new_admin_user GET /admin/users/new(.:format) {:action=>"new", :controller=>"admin/users"}
edit_admin_user GET /admin/users/:id/edit(.:format) {:action=>"edit", :controller=>"admin/users"}
admin_user GET /admin/users/:id(.:format) {:action=>"show", :controller=>"admin/users"}
PUT /admin/users/:id(.:format) {:action=>"update", :controller=>"admin/users"}
DELETE /admin/users/:id(.:format) {:action=>"destroy", :controller=>"admin/users"}
admin_comments GET /admin/comments(.:format) {:action=>"index", :controller=>"admin/comments"}
POST /admin/comments(.:format) {:action=>"create", :controller=>"admin/comments"}
new_admin_comment GET /admin/comments/new(.:format) {:action=>"new", :controller=>"admin/comments"}
edit_admin_comment GET /admin/comments/:id/edit(.:format) {:action=>"edit", :controller=>"admin/comments"}
admin_comment GET /admin/comments/:id(.:format) {:action=>"show", :controller=>"admin/comments"}
PUT /admin/comments/:id(.:format) {:action=>"update", :controller=>"admin/comments"}
DELETE /admin/comments/:id(.:format) {:action=>"destroy", :controller=>"admin/comments"}
new_user_session GET /admin/login(.:format) {:action=>"new", :controller=>"active_admin/devise/sessions"}
user_session POST /admin/login(.:format) {:action=>"create", :controller=>"active_admin/devise/sessions"}
destroy_user_session DELETE|GET /admin/logout(.:format) {:action=>"destroy", :controller=>"active_admin/devise/sessions"}
user_password POST /admin/password(.:format) {:action=>"create", :controller=>"active_admin/devise/passwords"}
new_user_password GET /admin/password/new(.:format) {:action=>"new", :controller=>"active_admin/devise/passwords"}
edit_user_password GET /admin/password/edit(.:format) {:action=>"edit", :controller=>"active_admin/devise/passwords"}
PUT /admin/password(.:format) {:action=>"update", :controller=>"active_admin/devise/passwords"}
root / {:controller=>"codes", :action=>"list"}
/:controller(/:action(/:id(.:format)))
我检查了旧修订版，路线是：
new_user_session GET /users/sign_in(.:format) {:action=>"new", :controller=>"devise/sessions"}
user_session POST /users/sign_in(.:format) {:action=>"create", :controller=>"devise/sessions"}
destroy_user_session DELETE /users/sign_out(.:format) {:action=>"destroy", :controller=>"devise/sessions"}
user_password POST /users/password(.:format) {:action=>"create", :controller=>"devise/passwords"}
new_user_password GET /users/password/new(.:format) {:action=>"new", :controller=>"devise/passwords"}
edit_user_password GET /users/password/edit(.:format) {:action=>"edit", :controller=>"devise/passwords"}
PUT /users/password(.:format) {:action=>"update", :controller=>"devise/passwords"}
cancel_user_registration GET /users/cancel(.:format) {:action=>"cancel", :controller=>"devise/registrations"}
user_registration POST /users(.:format) {:action=>"create", :controller=>"devise/registrations"}
new_user_registration GET /users/sign_up(.:format) {:action=>"new", :controller=>"devise/registrations"}
edit_user_registration GET /users/edit(.:format) {:action=>"edit", :controller=>"devise/registrations"}
PUT /users(.:format) {:action=>"update", :controller=>"devise/registrations"}
DELETE /users(.:format) {:action=>"destroy", :controller=>"devise/registrations"}
您可能缺少的一件事是将用户模型声明为"可注册"，以获取 Devise 生成的注册路由。
你应该有这样的东西：
class User < ActiveRecord::Base
# Include devise modules
devise :database_authenticatable, :registerable, ...
我曾经遇到过这个问题，这就是解决它的方法。
您似乎对普通用户和管理员用户使用相同的模型。ActiveAdmin 需要为管理员提供单独的模型。尝试还原生成器所做的更改，然后运行以下命令：
rails generate active_admin:resource AdminUser
rake db:migrate
这将创建一个AdminUser模型，该模型与您网站的用户完全没有链接。
在 routes.rb 中，指定 devise_for ：users这将恢复设计用户路由