7

我想使用 Ruby on Rails 进行身份验证，每个用户都有自己的帐户。但现在我收到了这个错误：

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

有人可以帮我吗？

这是代码：

完整跟踪：

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'

项目控制器.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

应用程序.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>

路线.rb

项目::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'
4

3 回答 3

13

您是否使用设备进行身份验证？我自己没有使用过它，但是通过查看设计代码和文档，看起来你应该before_filter :authenticate_user!在控制器（或某些父控制器类）中使用类似user_signed_in?.

请注意，从 Rails 5.1 开始，您必须before_action改用它。

于 2012-05-23T09:42:09.823 回答
1

您是如何生成设计模型的？

就我而言，我以不同的方式生成它。如果你像这样生成它：

rails g devise User/Person

然后您应该能够在您的控制器中使用它来确保用户在查看页面之前已登录：

注意我使用的是人而不是用户

before_action :authenticate_person!

要检查他们是否已登录，请执行以下操作：

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

诀窍是了解这些帮助程序是根据您最初生成设计模型的方式自动生成的。

它记录在 Devise 的 github 上：

请注意，如果您的 Devise 模型被称为 Member 而不是 User，例如，那么可用的助手是：

before_action :authenticate_member!

member_signed_in?

current_member

member_session

https://github.com/plataformatec/devise

笔记：

:authenticate_user_person就像我生成的那个不起作用，我不知道为什么它只选择了最后一部分。如果您不确定，通常错误页面会显示：

“你的意思是#your_devise_model_name_here#？”

在此处输入图像描述

于 2018-01-16T16:44:31.467 回答
0

确保您安装了身份验证 gem 设计。方法'user_signed_in? ' 不是 rails3 内置的。

请参阅设计：NoMethod 错误和 user_signed_in

于 2012-05-23T09:46:40.813 回答