我想要使用Ruby on Rails進行身份驗證，即每個用戶都有自己的帳戶。但現在我得到這個錯誤：未定義的方法`user_signed_in？'對於＃<ProjectsController：0x007faead1853e0>

undefined method user_signed_in? for #<ProjectsController:0x007faead1853e0>

有人能幫助我嗎？

下面是代碼：

完整跟蹤：

app/controllers/projects_controller.rb:69:in `require_login' 
activesupport (3.2.3) lib/active_support/callbacks.rb:418:in `_run__2505248868868045404__process_action__114470166732456289__callbacks' 
activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks' 
activesupport (3.2.3) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.3) lib/abstract_controller/callbacks.rb:17:in `process_action' 
actionpack (3.2.3) lib/action_controller/metal/rescue.rb:29:in `process_action' 
actionpack (3.2.3) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' 
activesupport (3.2.3) lib/active_support/notifications.rb:123:in `block in instrument' 
activesupport (3.2.3) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (3.2.3) lib/active_support/notifications.rb:123:in `instrument' 
actionpack (3.2.3) lib/action_controller/metal/instrumentation.rb:29:in `process_action' 
actionpack (3.2.3) lib/action_controller/metal/params_wrapper.rb:205:in `process_action' 
activerecord (3.2.3) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (3.2.3) lib/abstract_controller/base.rb:121:in `process' 
actionpack (3.2.3) lib/abstract_controller/rendering.rb:45:in `process' 
actionpack (3.2.3) lib/action_controller/metal.rb:203:in `dispatch' 
actionpack (3.2.3) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' 
actionpack (3.2.3) lib/action_controller/metal.rb:246:in `block in action' 
actionpack (3.2.3) lib/action_dispatch/routing/route_set.rb:73:in `call' 
actionpack (3.2.3) lib/action_dispatch/routing/route_set.rb:73:in `dispatch' 
actionpack (3.2.3) lib/action_dispatch/routing/route_set.rb:36:in `call' 
journey (1.0.3) lib/journey/router.rb:68:in `block in call' 
journey (1.0.3) lib/journey/router.rb:56:in `each' 
journey (1.0.3) lib/journey/router.rb:56:in `call' 
actionpack (3.2.3) lib/action_dispatch/routing/route_set.rb:600:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
rack (1.4.1) lib/rack/etag.rb:23:in `call' 
rack (1.4.1) lib/rack/conditionalget.rb:25:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/head.rb:14:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/params_parser.rb:21:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/flash.rb:242:in `call' 
rack (1.4.1) lib/rack/session/abstract/id.rb:205:in `context' 
rack (1.4.1) lib/rack/session/abstract/id.rb:200:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/cookies.rb:338:in `call' 
activerecord (3.2.3) lib/active_record/query_cache.rb:64:in `call' 
activerecord (3.2.3) lib/active_record/connection_adapters/abstract/connection_pool.rb:467:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call' 
activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `_run__4031929640367205598__call__2058268190974805736__callbacks' 
activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_call_callbacks' 
activesupport (3.2.3) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.3) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/reloader.rb:65:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/remote_ip.rb:31:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' 
railties (3.2.3) lib/rails/rack/logger.rb:26:in `call_app' 
railties (3.2.3) lib/rails/rack/logger.rb:16:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/request_id.rb:22:in `call' 
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call' 
rack (1.4.1) lib/rack/runtime.rb:17:in `call' 
activesupport (3.2.3) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
rack (1.4.1) lib/rack/lock.rb:15:in `call' 
actionpack (3.2.3) lib/action_dispatch/middleware/static.rb:62:in `call' 
railties (3.2.3) lib/rails/engine.rb:479:in `call' 
railties (3.2.3) lib/rails/application.rb:220:in `call' 
rack (1.4.1) lib/rack/content_length.rb:14:in `call' 
railties (3.2.3) lib/rails/rack/log_tailer.rb:14:in `call' 
rack (1.4.1) lib/rack/handler/webrick.rb:59:in `service' 
/Users/sinaoberle/.rbenv/versions/1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service' 
/Users/sinaoberle/.rbenv/versions/1.9.3-p0/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run' 
/Users/sinaoberle/.rbenv/versions/1.9.3-p0/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'

projects_controller.rb

class ProjectsController < ApplicationController 
    before_filter :require_login 
    # GET /projects 
    # GET /projects.json 
    def index 
    @projects = current_user.projects 

    end 

    # GET /projects/1 
    # GET /projects/1.json 
    def show 
    @projects = current_user.projects.find(params[:id]) 

    end 

    # GET /projects/new 
    # GET /projects/new.json 
    def new 
    @projects = current_user.projects.build 

    end 

    # GET /projects/1/edit 
    def show 
    @projects = current_user.projects.find(params[:id]) 

    end 

    # POST /projects 
    # POST /projects.json 
    def create 
    @projects = current_user.projects.build(params[:mytime]) 
     if @projects.save 
     redirect_to projects_path, 
      notice: 'Created successfully!' 
     else 
     render 'new' 
     end 
    end 

    # PUT /projects/1 
    # PUT /projects/1.json 
    def update 
    @projects = current_user.projects.find(params[:id]) 
     if @projects.update_attributes(params[:mytime]) 
     redirect_to projects_path, 
      notice: 'Changed successfully!' 
     else 
     render 'edit' 

    end 
end 

    # DELETE /projects/1 
    # DELETE /projects/1.json 
    def destroy 
    @projects = current_user.projects.find(params[:id]) 
    @projects.destroy 
    redirect_to projects_url, 
     notice: 'Deleted successfully!' 

    end 
end 

private 

def require_login 
    unless user_signed_in? 
    redirect_to login_path, 
    alert: "Please, Sign In first!" 
end 
end

application.html.erb

<!DOCTYPE html> 
<html> 
<head> 
    <title>Test</title> 
    <%= stylesheet_link_tag "application", :media => "all" %> 
    <%= javascript_include_tag "application" %> 
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> 


    <%= csrf_meta_tags %> 
</head> 
<body> 
<div id="container"> 

    <div id="content"> 
     <% if flash[:notice] %> 
     <p id="notice"> 
      <%= flash[:notice] %> 
     </p> 
     <% end %> 

     <% if flash[:alert] %> 
     <p id= "alert"> 
      <%= flash[:alert] %> 
     </p> 
     <% end %> 
    </div> 
    <div id="footer"> 
    <%= link_to "Sign In", new_user_path %> | 
     <% if user_signed_in? %> 
     <%= link_to "Logout", logout_path, method: :delete %> | 
     <%= link_to "Test", projects_path %> 
     <% else %> 
     <%= link_to "Login", login_path %> 
     <% end %> 
     <%= yield %> 
    </div> 
</div> 
</body> 
</html>

的routes.rb

項目:: Application.routes.draw做

get "pages/home" 

    resources :projects 
    resources :users, :only => [:new, :create] 
    resources :sessions, :only => [:create] 

    get "login" => "sessions#new", as: "login" 
    post "sessions" => "sessions#create", as: "sessions" 
    delete "logout" => "sessions#destroy", as: "logout" 

    root to: 'pages#home'

來源

2012-05-23 UserS

您使用的設計進行驗證？我沒有用過它自己，但通過查看devise code和documentation它看起來應該在控制器（或某些父控制器類）中使用before_filter :authenticate_user!，在此您想使用像user_signed_in?這樣的助手。

來源

2012-05-23 09:42:09

@UserS所以這是真正的問題？ –

確保您安裝了身份驗證gem設計。方法'user_signed_in？ '不在rails3中內置。

見Devise: NoMethod Error & user_signed_in

來源

2012-05-23 09:46:40 dmr

我應該使用哪個命令？我把它放在我的寶石文件中：gem'devise'，'2.1.0.rc2' – UserS

gem install devise？ – UserS

我試過了。但它不工作。 – UserS

你是如何產生的色器件模型？

在我的情況下，我以不同的方式生成它。如果產生這樣的：

rails g devise User/Person

那麼你應該能夠查看網頁之前使用這個在你的控制，以確保用戶signed_in：

通知我使用人，而不是用戶

before_action :authenticate_person!

要檢查自己是否登錄，做像這樣：

<% if person_signed_in? %> 
     <p>You are signed in</p> 
    <% else %> 
     <p>Aww you are not signed in!</p> 
    <% end %>

訣竅是瞭解這些助手是根據您最初生成Devise模型的方式自動生成的。

據記載上制定的github上：

Notice that if your Devise model is called Member instead of User, for example, then the helpers available are:
before_action :authenticate_member! 

member_signed_in? 

current_member 

member_session 

https://github.com/plataformatec/devise

注：

:authenticate_user_person像我產生不工作，我不知道，爲什麼它選擇了最後一個僅部分。如果您不確定，通常錯誤頁面會顯示：

「您的意思是＃your_devise_model_name_here＃？」

來源

2018-01-16 16:44:31

未定義的方法`user_signed_in？'對於＃<ProjectsController：0x007faead1853e0>

回答

你是如何產生的色器件模型？

注：

相關問題