如果用户没有使用Devise认证，请重定向登录页面 [英] Redirect to log in page if user is not authenticated with Devise

问题描述

我正在使用Devise与Ruby on Rails。

I'm using Devise with Ruby on Rails.

如果尝试访问页面，将未经身份验证的用户重定向会话＃新页面的推荐方法是什么这需要认证？

What is the recommended way to redirect unauthenticated users to the sessions#new page if they attempt to access a page that requires authentication?

现在我收到一条错误，表示没有路由匹配他们尝试访问的路由（导致生产中出现404错误）。

Right now I get an error that says no route matches the one they attempt to access (leading to a 404 error in production).

推荐答案

只需简单地将此方法添加到 application_controller.rb

Just simple add this method to application_controller.rb

  protected
  def authenticate_user!
    if user_signed_in?
      super
    else
      redirect_to login_path, :notice => 'if you want to add a notice'
      ## if you want render 404 page
      ## render :file => File.join(Rails.root, 'public/404'), :formats => [:html], :status => 404, :layout => false
    end
  end

您可以在 before_filter 另一个你想要的控制器。

And you can call this method on before_filter another controllers you want.

例如：

class HomesController < ApplicationController
  before_filter :authenticate_user!
  ## if you want spesific action for require authentication
  ## before_filter :authenticate_user!, :only => [:action1, :action2]
end

不要忘记添加 login_path into routes.rb

Don't forget add login_path into routes.rb

devise_scope :user do
  match '/sign-in' => "devise/sessions#new", :as => :login
end

注意：当我的应用程序玩设计时，我总是使用这种方式认证..（rails 3.2和rails 4.0.1）

note : I always use this way when play with devise for my apps authentication.. (rails 3.2 and rails 4.0.1)

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