设计：如果没有用户，则重定向到注册页面，而不是登录 [英] Devise: Redirect to sign up page instead of sign in if no user exists

问题描述

如果没有用户在场，我希望将请求重定向到注册页面而不是登录页面。因此，我要覆盖 authenticate_user！应用程序控制器中的方法：

If no user present, I want a request to be redirected to Sign Up page instead of Login page. So for that, I am overriding the authenticate_user! the method in Application controller:

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  before_action :authenticate_user!

  protected

  def authenticate_user!
    redirect_to new_user_registration_path unless User.any?
  end
end

在这里，问题是页面未重定向正确地。该请求将被重定向到注册页面，但无限期，即请求未完成。在Rails服务器控制台上显示：

Here, the issue is the page isn't redirected properly. The request is getting redirected to the sign-up page but indefinitely, i.e. request is not getting completed. On the rails server console it is showing:

Filter chain halted as :authenticate_user! rendered or redirected
Completed 302 Found in 0ms (ActiveRecord: 0.0ms)

推荐答案

Devise不会不建议覆盖 authenticate_user 和 authenticate_user！

Devise does not recommend overriding the authenticate_user and authenticate_user! methods.

相反，请使用route方法定义一个自定义失败应用，该方法将返回表示命名路由的符号以重定向到：

Instead, define a custom failure app with a route method that returns a symbol representing the named route to redirect to:

# app/lib/my_failure_app.rb
class MyFailureApp < Devise::FailureApp
  def route(scope)
    :new_user_registration_url
  end
end

然后在Devise初始化程序中，指定失败的应用程序：

Then inside the Devise initializer, specify your failure app:

# config/initializers/devise.rb
config.warden do |manager|
  manager.failure_app = MyFailureApp
end

如果您未初始化持续出现CustomFailure错误，并且已将CustomFailure类放在/ lib目录下，请确保将lib文件自动加载到application.rb文件中，如下所示

If you’re getting an uninitialized constant CustomFailure error, and you’ve put the CustomFailure class under your /lib directory, make sure to autoload your lib files in your application.rb file, like below

config.autoload_paths << Rails.root.join('lib') 

请参见 https://github.com/plataformatec/devise/wiki/重定向到新注册（注册）-未经身份验证的路径

这篇关于设计：如果没有用户，则重定向到注册页面，而不是登录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！