Omniauth-facebook&Devise:如果存在电子邮件

Question

我正在使用omniauth-facebook并设计我的rails 4应用程序中的身份验证.我想要一个已经通过设计验证的用户,如果他们选择的话,也可以稍后添加facebook auth.
我想弄清楚如何检查设备登录用户的电子邮件是否与Facebook用户的电子邮件匹配,如果是,则将uid和提供者添加到该注册用户.

目前,我收到设计错误消息:" 电子邮件已被采取 "

User.rb

def self.from_omniauth(auth)
  where(auth.slice(:provider, :uid)).first_or_create do |user|
    user.provider = auth.provider
    user.uid = auth.uid
    user.name = auth.info.name
    user.username = auth.info.username
    user.email = auth.info.email
    user.oauth_token = auth.credentials.token
    user.oauth_expires_at = Time.at(auth.credentials.expires_at)      
  end
end

def self.new_with_session(params, session)
  if session["devise.user_attributes"]
    new(session["devise.user_attributes"], without_protection: true) do |user|
      user.attributes = params
      user.valid?
    end
  else
    super
  end
end

控制器:

class OmniauthCallbacksController < Devise::OmniauthCallbacksController
  def all
    #render :text => "<pre>" + env["omniauth.auth"].to_yaml and return
    user = User.from_omniauth(request.env["omniauth.auth"])
    if user.persisted?
      #session[:user_id] = user.id # for current_user
      flash.notice = "Signed in!"
      sign_in_and_redirect user
    else
      session["devise.user_attributes"] = user.attributes
      redirect_to new_user_registration_url
    end
  end
  alias_method :facebook, :all
end

谢谢!!!!

Answer 1

我只是遇到了同样的问题并使用此代码来解决它.

它首先检查数据库中是否存在电子邮件,如果存在,则更新uid和提供者字段,如果不是,我创建一个带有auth参数的新用户.最后我只返回变量return_user,流程正常工作.

def self.from_omniauth(auth)
  if self.where(email: auth.info.email).exists?
    return_user = self.where(email: auth.info.email).first
    return_user.provider = auth.provider
    return_user.uid = auth.uid
  else
    return_user = self.create do |user|
       user.provider = auth.provider
       user.uid = auth.uid
       user.name = auth.info.name
       user.username = auth.info.username
       user.email = auth.info.email
       user.oauth_token = auth.credentials.token
       user.oauth_expires_at = Time.at(auth.credentials.expires_at) 
    end
  end

  return_user
end