設計Twitter Omniauth重定向到sign_up

Question

我已經使用omniauth-facebook成功實現了Devise，現在正在Twitter上嘗試一下。 我已經將Facebook的Devise設置復制到Twitter的方法中。 但是，在成功批准我的應用程序使用我的Twitter帳戶后，我被重定向回我的用戶注冊頁面（ http：// localhost：3000 / users / sign_up ）。 為什么是這樣？

控制台輸出

Started GET "/users/auth/twitter/callback?oauth_token=zeIyTgAAAAAAwAQEAAABVcusPxc&oauth_verifier=q24BAAziukc8bF6nnaxuRoouuGaPuoF3" for ::1 at 2016-07-08 14:01:51 -0400
I, [2016-07-08T14:01:51.984997 #44805]  INFO -- omniauth: (twitter) Callback phase initiated.
Processing by Users::OmniauthCallbacksController#twitter as HTML
  Parameters: {"oauth_token"=>"zeIyTgAAAAAAwAQEAAABVcusPxc", "oauth_verifier"=>"q24BAAziukc8bF6nnaxuRoouuGaPuoF3"}
  User Load (0.7ms)  SELECT  "users".* FROM "users" WHERE "users"."provider" = $1 AND "users"."uid" = $2  ORDER BY "users"."id" ASC LIMIT 1  [["provider", "twitter"], ["uid", "248829852"]]
   (0.2ms)  BEGIN
   (0.1ms)  ROLLBACK
Redirected to http://localhost:3000/users/sign_up
Completed 302 Found in 165ms (ActiveRecord: 1.0ms)

控制器/用戶/omniauth_callbacks_controller.rb

類Users :: OmniauthCallbacksController <Devise :: OmniauthCallbacksController def facebook @user = User.from_omniauth（request.env [“ omniauth.auth”]）

    if @user.persisted?
      sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated
      set_flash_message(:notice, :success, :kind => "Facebook") if is_navigational_format?
    else
      session["devise.facebook_data"] = request.env["omniauth.auth"]
      redirect_to new_user_registration_url
    end
  end

  def twitter
    @user = User.from_omniauth(request.env["omniauth.auth"])

    if @user.persisted?
      sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated
      set_flash_message(:notice, :success, :kind => "Twitter") if is_navigational_format?
    else
      session["devise.twitter_data"] = request.env["omniauth.auth"].except("extra")
      redirect_to new_user_registration_url
    end
  end

  def failure
    redirect_to root_path
  end
end

型號/user.rb

class User < ActiveRecord::Base
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable,
         :omniauthable, :omniauth_providers => [:facebook, :twitter]

   def self.from_omniauth(auth)
   where(provider: auth.provider, uid: auth.uid).first_or_create do |user|
     user.email = auth.info.email
     user.password = Devise.friendly_token[0,20]
     user.name = auth.info.name   # assuming the user model has a name
     user.image = auth.info.image # assuming the user model has an image
   end
 end

end

config / routes.rb

Rails.application.routes.draw do

  devise_for :users,
    :controllers => { :omniauth_callbacks => "users/omniauth_callbacks" }


   root 'welcome#index'
end

Answer 1

像這樣將調試輸出添加到您的Twitter回調中，以查看阻止提交事務的確切錯誤：

  def twitter
    @user = User.from_omniauth(request.env["omniauth.auth"])

    if @user.persisted?
      sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated
      set_flash_message(:notice, :success, :kind => "Twitter") if is_navigational_format?
    else
      session["devise.twitter_data"] = request.env["omniauth.auth"].except("extra")

      puts @user.errors

      redirect_to new_user_registration_url
    end
  end

眾所周知，Twitter在注冊過程中不需要電子郵件，因此在對此類帳戶進行oauth操作時，它可能不會返回該值。

對於這個問題，Devise默認情況下為某些字段提供自動驗證。 從Devise來源 ：

  def self.included(base)
    base.extend ClassMethods
    assert_validations_api!(base)

    base.class_eval do
      validates_presence_of   :email, if: :email_required?

要關閉默認的電子郵件狀態驗證，請將其放入User模型：

def email_required?
  false
end

根據您的用例，您可能還需要更改默認身份驗證密鑰以不使用電子郵件：

在config / initializers / devise.rb中 ：

config.authentication_keys = [ :username ]

更新

當使用由Devise提供的生成器時， user表的結尾可能為null: false email字段上的null: false約束。 要刪除它，請使用以下方法創建遷移：

change_column :users, :email, :string, :null => true

並更新數據庫架構：

bundle exec rake db:migrate

Answer 2

我在使用Github身份驗證時遇到了同樣的錯誤，最后通過將范圍添加到devise.rb的config.omniauth中，它起作用了！ 也許它需要范圍用戶來檢索電子郵件和其他信息

config.omniauth :github, ENV['GITHUB_APP_ID'], ENV['GITHUB_APP_SECRET'], scope: 'repo,user'