如果用户未通过 Devise 进行身份验证，则重定向到登录页面 [英] Redirect to log in page if user is not authenticated with Devise

问题描述

我正在使用 Devise 和 Ruby on Rails.

I'm using Devise with Ruby on Rails.

如果未经身份验证的用户尝试访问需要身份验证的页面，推荐将其重定向到 session#new 页面的方法是什么?

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消息，指出没有路由与他们尝试访问的路由匹配(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

只需将此方法添加到 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

你可以在before_filter另一个你想要的控制器上调用这个方法.

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

不要忘记将 login_path 添加到 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:我在玩设计时总是使用这种方式来验证我的应用程序..(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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