登录或注册后设计重定向回原始位置？

Question

这里我使用Devise Gem进行身份验证。如果有人想要在没有登录的情况下打开页面，那么它会重定向到sign_in页面，然后在登录后返回到用户尝试打开的页面。 我使用Redirect loop with Devise after_sign_in_path_for链接来解决我的问题，但它对我不起作用。

 def after_sign_in_path_for(resource)
   params[:next] || super 
 end

它不会将我重定向到我要打开的页面。 例如：如果我想打开“127.0.0.1:3000/post/2/edit”，则登录后不会返回此页面。

Answer 1

寻求的最佳资源是官方回购/维基/问题，然后是SO。你找到的答案已经过时了。

以下是答案： https://github.com/plataformatec/devise/wiki/How-To:-Redirect-back-to-current-page-after-sign-in,-sign-out,-sign-up,-update

只需在ApplicationController中添加以下内容 for versions devise＆gt; 3.2.1：

    # This example assumes that you have setup devise to authenticate a class named User.
class ApplicationController < ActionController::Base
  before_action :store_user_location!, if: :storable_location?
  # The callback which stores the current location must be added before you authenticate the user 
  # as `authenticate_user!` (or whatever your resource is) will halt the filter chain and redirect 
  # before the location can be stored.
  before_action :authenticate_user!

  private
    # Its important that the location is NOT stored if:
    # - The request method is not GET (non idempotent)
    # - The request is handled by a Devise controller such as Devise::SessionsController as that could cause an 
    #    infinite redirect loop.
    # - The request is an Ajax request as this can lead to very unexpected behaviour.
    def storable_location?
      request.get? && is_navigational_format? && !devise_controller? && !request.xhr? 
    end

    def store_user_location!
      # :user is the scope we are authenticating
      store_location_for(:user, request.fullpath)
    end
end

然后在登录后重定向，您必须覆盖此方法：

def after_sign_in_path_for(resource_or_scope)
  stored_location_for(resource_or_scope) || super
end

Answer 2

您不需要所有这些代码。 Devise（作为最新版本）已经为您保存了位置。

请使用：

def after_sign_in_path_for(resource)
  request.env['omniauth.origin'] || stored_location_for(resource) || root_url
end

这会将用户重定向到最新的omniauth.source，或者将stored_location重定向到最后一种情况，即根网址。

我以为我需要创建该方法，但Devise已经做到了。

来源：https://github.com/plataformatec/devise/wiki/How-To:-redirect-to-a-specific-page-on-successful-sign-in

Answer 3

截至Devise 4，它对我无缝起作用：

  

设计会自动重定向登录并在您注册时注册   使用设计存储当前页面的位置   store_location_for(resource)。要执行此操作，请编辑您的   ApplicationController in   app/controllers/application_controller.rb。添加：

# saves the location before loading each page so we can return to the
# right page. If we're on a devise page, we don't want to store that as the
# place to return to (for example, we don't want to return to the sign in page
# after signing in), which is what the :unless prevents
before_filter :store_current_location, :unless => :devise_controller?

private
  # override the devise helper to store the current location so we can
  # redirect to it after loggin in or out. This override makes signing in
  # and signing up work automatically.
  def store_current_location
    store_location_for(:user, request.url)
  end

     

将以下内容添加到ApplicationController以进行注销   重定向：

private
  # override the devise method for where to go after signing out because theirs
  # always goes to the root path. Because devise uses a session variable and
  # the session is destroyed on log out, we need to use request.referrer
  # root_path is there as a backup
  def after_sign_out_path_for(resource)
    request.referrer || root_path
  end

Answer 4

正如官方文档中所指出的，simpler solution只是将其添加到您的application_controller.rb：

class ApplicationController < ActionController::Base


private

# If your model is called User
def after_sign_in_path_for(resource)
  session["user_return_to"] || root_path
end

重要说明（我也忽略了这一点）是，为了实现这一目标，您需要在控制器的authenticate_user!中调用默认情况下在Devise中提供的before_action:方法。这将调用store_location_for可用out of the box in Devise，其余部分由application_controller.rb中的上述代码处理，因此无需重写代码以保存请求网址。

Answer 5

如果您的登录表单具有自己的页面，则此处的某些其他解决方案可能无效，而不是例如每页的标题中的登录表单。登录后，用户需要返回两个页面，而不仅仅是一个。

Devise在Redirecting back to the current page after sign in, sign out, update上有一个很好的操作方法，下面是代码。

在会话中存储原始URL是最佳选择。除了解决上述两个页面的问题之外，“许多浏览器不发送[request.referer]标题。因此，实现此功能的唯一强大的跨浏览器方式是使用会话。“

在会话中存储URL时，重要的是不要存储任何POST，PUT或DELETE请求的URL，也不要存储任何XHR请求，即用户无法实际重定向的任何内容。

请注意，注销后，用户的会话将被销毁，因此存储的URL将消失。在这种情况下，可以将用户发送回request.referer。这似乎是可以接受的，因为大多数网站都在每个页面上都有一个退出链接，因此返回推荐人实际上会有效。

class ApplicationController < ActionController::Base
  before_action :store_user_location!, if: :storable_location?
  before_action :authenticate_user!

  private
    def storable_location?
      request.get? && is_navigational_format? && !devise_controller? && !request.xhr? 
    end

    def store_user_location!
      store_location_for(:user, request.fullpath)
    end

   def after_sign_in_path_for(resource_or_scope)
     stored_location_for(resource_or_scope) || super
   end

   def after_sign_out_path_for(resource_or_scope)
     request.referrer || super
   end
end

Answer 6

我有同样的疑问并发现了这一点，也尝试了

def after_sign_in_path_for(resource_or_scope)
  session.fetch 'user_return_to', admin_root_path
end

Answer 7

gem 'devise', '~> 4.4.0'

1. 创建sessions_controller.rb：class SessionsController < Devise::SessionsController

2. 添加以下内容（如果您的登录网址不是/ users，则修改正则表达式）

   def before_login
     session[:previous_url] = request.fullpath unless request.fullpath =~ /\/users/
   end
   
   def after_login
     session[:previous_url] || root_path
   end
   

请注意，如果您在/ users下有/ users / dashboard或其他位置，则此方法无效。可能希望通过正则表达式获得更具体的信息。

Answer 8

在Devise 4.4.3中无需定义新方法。只需直接调用方法DeviseController#after_sign_in_path_for。

这样的代码：

  class YourController < DeviseController

    # ... 
    if manager.valid_password? params[:manager][:password]
      sign_in manager

      # call this method directly , if your controller extends DeviseController
      redirect_to after_sign_in_path_for(manager), notice: 'welcome!'
    end

此外，如果您使用自定义的登录方法并使用DeviseController，则不得使用以下代码：

# this method will login automatically, in most cases this method is 
# useless and misleading.  
prepend_before_action :allow_params_authentication!, only: :create