Omniauth Facebook重定向到注册屏幕，而不是创建用户 [英] Omniauth Facebook redirects to registration screen instead of creating user

问题描述

按照gem的教程完全，我似乎遇到了一些问题。我首先点击链接通过Facebook注册并被重定向到Facebook。我点击确定，并带回到我的注册页面。不创建新用户。如果我再次尝试点击注册链接，它只是刷新页面与地址栏 http：// localhost：3000 / register＃_ = _ 。我做错了什么？

Following the gem's tutorial exactly I still seem to be running into some issues. I first click the link to sign up via Facebook and get redirected to Facebook. I click okay and get brought back to my registration page. No new user is created. If I try to click the register link again it just refreshes the page with this in the address bar http://localhost:3000/register#_=_. What am I doing wrong?

用户模型

devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable, :omniauthable, omniauth_providers: [:facebook]

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.first_name = auth.info.first_name
    user.last_name = auth.info.last_name
  end
end

Callback Controller

class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
  def facebook
    # You need to implement the method below in your model (e.g. app/models/user.rb)
    @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
end

控制台代码

Started GET "/auth/facebook/callback?code=AQCh2rckn0dMOKNggTQJEbx_LTMGjNrDdumTu_Ay9Cwr_87A2pro_gOgFtSa866DouLuj4kMLVMMPfR3amp_X6rNSlAwOQ51RXK053vxhtEyJNY8StcqiOVZ6YqpGmfg8Zsz8RIXQr2xRclPmW9j9o8fqg83CoFiH1j-e_YOOuyCaX6xkoVN1eC3kjWSezg_WFm3p6aXu_XYxw1-Jf2j3Ijqt4kR4ySLHfmauj1z9UUcy5HANMIjaRx84NiZHNdJq6fzuAT37y9cXvP5HawonBBA0bG7ejAk5AATBYJj-kTXdCR9673cQ55O4GbAw_LCzzy7_YgHkFR9S038tP68HnXm&state=d013067bc67bd4bff43b6ac77bea69f5b113858cb234452a" for ::1 at 2015-07-12 19:28:55 -0400
I, [2015-07-12T19:28:55.026584 #7266]  INFO -- omniauth: (facebook) Callback phase initiated.
Processing by Users::OmniauthCallbacksController#facebook as HTML
  Parameters: {"code"=>"AQCh2rckn0dMOKNggTQJEbx_LTMGjNrDdumTu_Ay9Cwr_87A2pro_gOgFtSa866DouLuj4kMLVMMPfR3amp_X6rNSlAwOQ51RXK053vxhtEyJNY8StcqiOVZ6YqpGmfg8Zsz8RIXQr2xRclPmW9j9o8fqg83CoFiH1j-e_YOOuyCaX6xkoVN1eC3kjWSezg_WFm3p6aXu_XYxw1-Jf2j3Ijqt4kR4ySLHfmauj1z9UUcy5HANMIjaRx84NiZHNdJq6fzuAT37y9cXvP5HawonBBA0bG7ejAk5AATBYJj-kTXdCR9673cQ55O4GbAw_LCzzy7_YgHkFR9S038tP68HnXm", "state"=>"d013067bc67bd4bff43b6ac77bea69f5b113858cb234452a"}
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."provider" = ? AND "users"."uid" = ?  ORDER BY "users"."id" ASC LIMIT 1  [["provider", "facebook"], ["uid", "836028396465704"]]
   (0.1ms)  begin transaction
   (0.0ms)  rollback transaction
Redirected to http://localhost:3000/register
Completed 302 Found in 59ms (ActiveRecord: 0.2ms)

推荐答案

将此行添加到config / initializers / devise.rb

Add this line to config/initializers/devise.rb

config.omniauth :facebook, "app id", "app secret", scope: 'email', info_fields: 'email'

新版Facebook API有变化，
简介Graph API v2.4

There's a change in the new version of Facebook API, Introducing Graph API v2.4

较少的默认字段可提高性能：为了帮助提高移动网络连接的效果，我们减少了API在默认情况下返回的字段数。您现在应该使用？fields = field1，field2语法来声明您希望API返回的所有字段。

Fewer default fields for faster performance: To help improve performance on mobile network connections, we've reduced the number of fields that the API returns by default. You should now use the ?fields=field1,field2 syntax to declare all the fields you want the API to return.

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