Facebook的omniauth.auth无法返回完整的哈希，并且无法成功登录Facebook

Question

我正在从http://www.theodinproject.com/ruby-on-rails/final-project进行facebook克隆项目。

我被omniauth-facebook部分所困，无法成功登录facebook。 我认为问题可能是由于request.env [“ omniauth.auth”]。 当我尝试引发request.env [“ omniauth.auth”]。to_yaml时。 我得到以下不完整的哈希。 它缺少很多信息，例如first_name，last_name，性别等。

--- !ruby/hash:OmniAuth::AuthHash
provider: facebook
uid: '10206926404981253'
info: !ruby/hash:OmniAuth::AuthHash::InfoHash
  name: Thomas Pan
  image: http://graph.facebook.com/10206926404981253/picture
credentials: !ruby/hash:OmniAuth::AuthHash
  token: <token>
  expires_at: 1442277104
  expires: true
extra: !ruby/hash:OmniAuth::AuthHash
  raw_info: !ruby/hash:OmniAuth::AuthHash
    name: Thomas Pan
    id: <id>

**为安全起见，将某些信息替换为<>。

我也在设计时使用了它。

按照我对devise和omniauth-facebook的指示，其他所有内容似乎都已正确设置。 https://github.com/plataformatec/devise/wiki/OmniAuth:-概述

user.rb

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
    user.gender = auth.extra.raw.gender
  end  
end  

devise.rb

config.omniauth :facebook, ENV['FB_APP_ID'], ENV['FB_APP_SECRET']

routes.rb

devise_for :users, :controllers => { :registrations => "users/registrations", :omniauth_callbacks => "users/omniauth-callbacks" }

omn​​iauth_callbacks_controller.rb

def facebook
  raise request.env['omniauth.auth'].to_yaml
  end
end

任何帮助将不胜感激！

版本信息：Rails 4.2.1 Ruby 2.0.0

Answer 1

在devise.rb ：

config.omniauth :facebook, ENV['FB_APP_ID'], ENV['FB_APP_SECRET'], scope: 'email', info_fields: 'email,name,first_name,last_name,gender'

Answer 2

创建一个OmniauthCallbacksController并添加以下代码

class OmniauthCallbacksController < ApplicationController
  skip_before_filter :authenticate_user!
  def all
    p env["omniauth.auth"]
    user = User.from_omniauth(env["omniauth.auth"])
    if user.persisted?
      # flash[:alert] = "You have to confirm your account before continuing."
      sign_in_and_redirect(user)
    else
      session["devise.user_attributes"] = user.attributes
      redirect_to new_user_registration_url
    end
  end

    def failure
      #handle you logic here..
      #and delegate to super.
      redirect_to new_user_registration_url
    end


  alias_method :facebook, :all
end

在你的config / routes.rb中

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

创建授权模型

rails g model Authorization

在迁移中添加以下代码

class CreateAuthorizations < ActiveRecord::Migration
  def change
    create_table :authorizations do |t|
      t.string :provider
      t.string :uid
      t.integer :user_id
      t.string :token
      t.string :secret
      t.timestamps
    end
  end
end

然后

rake db:migrate

在您的模型/authorization.rb中

belongs_to :user

在您的模型/user.rb中

has_many :authorizations

def self.from_omniauth(auth)
  authorization = Authorization.where(:provider => auth.provider, :uid => auth.uid.to_s).first_or_initialize
  authorization.token = auth.credentials.token
  if authorization.user.blank?
    user = User.where('email = ?', auth["info"]["email"]).first
    if user.blank?
     user = User.new
     user.password = Devise.friendly_token[0,10]
     user.email = auth.info.email
     user.save
    end
   authorization.user_id = user.id       
  end
  authorization.save
  authorization.user
end

希望这会帮助你。