这个问题之前已经报告过，但我仍然无法找到解决方案。
我已将插件 Devise 安装到我的新 RoR 项目中。当我点击注册链接时，我被重定向到以下路线：
http://localhost:3000/users/registration/sign_up http://localhost:3000/users/registration/sign_up
但是，我收到以下错误：
undefined method `user_registration_path' for #<#<Class:0x007fd5d3503d58>:0x007fd5d3b0dcd0>
提取的源代码（第 5 行附近）：
2: <h1>Sign up</h1>
3: </div>
4:
5: <%= simple_form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
6: <%= f.error_notification %>
7:
8: <div class="inputs">
我的路线产生以下结果：
new_user_session GET /users/sign_in(.:format) devise/sessions#new
user_session POST /users/sign_in(.:format) devise/sessions#create
destroy_user_session GET /users/sign_out(.:format) devise/sessions#destroy
password POST /users/password(.:format) devise/passwords#create {:name_prefix=>:user}
new_password GET /users/password/new(.:format) devise/passwords#new {:name_prefix=>:user}
edit_password GET /users/password/edit(.:format) devise/passwords#edit {:name_prefix=>:user}
PUT /users/password(.:format) devise/passwords#update {:name_prefix=>:user}
POST /users/registration(.:format) devise/registrations#create {:name_prefix=>"user_registration"}
new GET /users/registration/sign_up(.:format) devise/registrations#new {:name_prefix=>"user_registration"}
edit GET /users/registration/edit(.:format) devise/registrations#edit {:name_prefix=>"user_registration"}
PUT /users/registration(.:format) devise/registrations#update {:name_prefix=>"user_registration"}
DELETE /users/registration(.:format) devise/registrations#destroy {:name_prefix=>"user_registration"}
home_index GET /home/index(.:format) home#index
users GET /users(.:format) users#index
POST /users(.:format) users#create
new_user GET /users/new(.:format) users#new
edit_user GET /users/:id/edit(.:format) users#edit
user GET /users/:id(.:format) users#show
PUT /users/:id(.:format) users#update
DELETE /users/:id(.:format) users#destroy
root / home#index
我的routes.rb有以下代码：
devise_for :users
get "home/index"
resources :users
root :to => "home#index"
我遇到了这个问题并重新启动 Rails 服务器为我解决了这个问题
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