omn​​iauth-devise错误：“验证失败：电子邮件已被占用” [英] omniauth-devise error: "Validation failed: Email has already been taken"

问题描述

• 我们正在尝试用omniauth设计创建一个rails 4应用程序：


• 使用google登录


• 使用链接登录


• 使用Twitter进行登录

在这里，我可以使用facebook，linkedin，twitter或者google帐号登录。但我的问题是：我的Google帐户电子邮件和linkedin电子邮件地址是一样的。然后用google登录，然后使用linkedin登录就是给我这个错误：

验证失败：电子邮件已被采取

这是一个问题，因为devise使用：unique =>

任何人都可以提供我很好的想法来处理这个错误？

解决方案

我按照这些步骤，为我工作正常：

1。宝石文件

  gem'omniauth-facebook'，'1.4.0'
 gem'omniauth-twitter '
 gem'omniauth-google-oauth2'
  

2。 config / route.rb

  devise_for：users，controllers：{omniauth_callbacks：omniauth_callbacks} 
  

3。链接

 <％= link_to使用Facebook登录，user_omniauth_authorize_path（：facebook）％> 
<％= link_to使用twitter登录，user_omniauth_authorize_path（：twitter）％> 
<％= link_to使用google登录，user_omniauth_authorize_path（：google_oauth2）％> 
  

4。控制器/ omniauth_callbacks_controller.rb

  class OmniauthCallbacksController< Devise :: OmniauthCallbacksController 
 skip_before_filter：authenticate_user！ 
 
 def all 
 user = User.from_omniauth（request.env [omniauth.auth]，current_user）
如果user.persisted？ 
 flash [：notice] =你成功登录!! 
 sign_in_and_redirect（user）
 else 
会话[devise.user_attributes] = user.attributes 
 redirect_to new_user_registration_url 
 end 
 end 
 
 def failure 
 super 
 end 
 
 alias_method：facebook，，all 
 alias_method：twitter，：all 
 alias_method：google_oauth2，all 
 end 
  

5。添加必填字段和模型

  rails g migration add_social_network_info_columns_to_users name image_url位置
 
＃生成新模型授权
 rails g模型授权user_id：整数提供者uid令牌秘密用户名
  

6。 model / User.rb

  class User< ActiveRecord :: Base 
 
 
需要securerandom
 
＃包含默认设计模块。其他可用的是：
＃：confirmable，：lockable，：timeoutable and：omniauthable 
 devise：database_authenticatable，：registerable，
：可恢复，可记忆，可追踪，可验证，
：omniauthable 
 
 has_many：授权
 
＃omniauth facebook提供者
 def self.from_omniauth（auth，current_user）
＃检查现有授权
＃通过以下方式查找或创建授权：provider，uid，token和secret 
 authorization = Authorization.where（
：provider => auth.provider，
：uid => auth。 uid.to_s，
：token => auth.credentials.token，
：secret => auth.credentials.secret 
）.first_or_initialize 
 
如果授权.user.blank？ 
 user = current_user.nil？ ？ user.where（'email =？'，auth [info] [email]）。first：current_user 
 
＃在用户表中保存用户相关数据
如果user.blank ？ 
 User.new（
：email => auth.info.email，
：password => Devise.friendly_token [0,10]，
：name => auth.info.name，
：locations => auth.info.location，
：image_url => auth.info.image 
）
＃since twitter不提供电子邮件，
＃，所以你需要跳过twitter验证。 
 auth.provider ==twitter？ user.save！（：validate => false）：user.save！ 
 end 
 
＃授权表中的商店授权相关数据
 authorization.username = auth.info.nickname 
 authorization.user_id = user.id 
授权。保存！ 
 end 
 authorization.user 
 end 
 end 
  

的 6。 model / Authorization.rb

 类授权< ActiveRecord :: Base 
 belongs_to：user 
 end 
  

来源：
https://github.com/mohitjain/social-login -in-rails

I am trying to create a rails 4 app with omniauth devise :

• signin with facebook
• signin with google
• signin with linkedin
• signin with twitter

Here, I am able to login in with either facebook, linkedin, twitter or google account. But my problem is: my google account email and linkedin email address are same. And login with google and then login with linkedin is giving me this error:

"Validation failed: Email has already been taken"

This is a problem because devise uses :unique => true in migration file for email field.

Can anyone provide me nice idea to handle this error please?

解决方案

I followed these steps and working fine for me:

1. Gemfile

gem 'omniauth-facebook', '1.4.0'
gem 'omniauth-twitter'
gem 'omniauth-google-oauth2'

2. config/route.rb

devise_for :users, controllers: { omniauth_callbacks: "omniauth_callbacks" }

3. Links

<%= link_to "Sign in with Facebook", user_omniauth_authorize_path(:facebook) %>
<%= link_to "Sign in with twitter", user_omniauth_authorize_path(:twitter) %>
<%= link_to "Sign in with google", user_omniauth_authorize_path(:google_oauth2) %>

4. controllers/omniauth_callbacks_controller.rb

class OmniauthCallbacksController < Devise::OmniauthCallbacksController
  skip_before_filter :authenticate_user!

  def all
    user = User.from_omniauth(request.env["omniauth.auth"], current_user)
    if user.persisted?
            flash[:notice] = "you are successfully logged in!!"
            sign_in_and_redirect(user)
        else
            session["devise.user_attributes"] = user.attributes
            redirect_to new_user_registration_url
        end
  end

  def failure
    super
  end

  alias_method :facebook, :all
  alias_method :twitter, :all
  alias_method :google_oauth2, :all
end

5. add required fields and model

rails g migration add_social_network_info_columns_to_users name image_url locations

# generate new model Authorization
rails g model Authorization user_id:integer provider uid token secret username

6. models/User.rb

class User < ActiveRecord::Base


require 'securerandom'

  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
    :recoverable, :rememberable, :trackable, :validatable,
    :omniauthable

  has_many :authorizations

  # omniauth facebook provider
  def self.from_omniauth(auth, current_user)
    # check for existing authorization
    # Find or create Authorization with: provider, uid, token and secret
    authorization = Authorization.where(
      :provider => auth.provider, 
      :uid => auth.uid.to_s, 
      :token => auth.credentials.token, 
      :secret => auth.credentials.secret
    ).first_or_initialize

    if authorization.user.blank?
      user = current_user.nil? ? User.where('email = ?', auth["info"]["email"]).first : current_user

      # save user related data in user table
      if user.blank?
        User.new(
          :email            => auth.info.email,
          :password         => Devise.friendly_token[0,10],
          :name             => auth.info.name,
          :locations        => auth.info.location,
          :image_url        => auth.info.image
        )
        # since twitter don't provide email, 
        # so you need to skip validation for twitter.
        auth.provider == "twitter" ?  user.save!(:validate => false) :  user.save!
      end

      # store authorization related data in authorization table
      authorization.username = auth.info.nickname
      authorization.user_id = user.id
      authorization.save!
    end
    authorization.user
  end
end

6. model/Authorization.rb

class Authorization < ActiveRecord::Base
  belongs_to :user
end

source: https://github.com/mohitjain/social-login-in-rails

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