Omniauth不工作

Question

所以我已经安装了Omniauth gem，它现在是用Devise实现的。

设计是很好的运作，然而，获得Omniauth设置已经是一场战斗，这是我仍在努力工作。我正在使用Omniauth和Twitter身份验证。

问题:当我点击‘登录twitter’图标时，它会把我重新引导到twitter，然后我会被提示进入我的twitter credntials..all，直到它开始重定向(回调)。

当它试图重定向到我的应用程序时，我得到以下错误：

NoMethodError in AuthenticationsController#create

undefined method `[]' for nil:NilClass

app/models/user.rb:14:in `apply_omniauth'
app/controllers/authentications_controller.rb:14:in `create'

注册控制器：

class RegistrationsController < Devise::RegistrationsController
  def create
    super
    session[:omniauth] = nil unless @user.new_record?
  end

  private

  def build_resource(*args)
    super
    if session[:omniauth]
      @user.apply_omniauth(session[:omniauth])
      @user.valid?
    end
  end
end

身份验证控制器：

class AuthenticationsController < ApplicationController
  def create
    omniauth = request.env["omniauth.auth"]
    authentication = Authentication.find_by_provider_and_uid(omniauth['provider'], omniauth['uid'])
    if authentication
      flash[:notice] = "Signed in successfully."
      sign_in_and_redirect(:user, authentication.user)
    elsif current_user
      current_user.authentications.create!(:provider => omniauth['provider'], :uid => omniauth['uid'])
      flash[:notice] = "Authentication successful."
      redirect_to authentications_url
    else
      user = User.new
      user.apply_omniauth(omniauth)
      if user.save
        flash[:notice] = "Signed in successfully."
        sign_in_and_redirect(:user, user)
      else
        session[:omniauth] = omniauth.except('extra')
        redirect_to new_user_registration_url
      end
    end
  end
end

User.rb (用户控制器)

class User < ActiveRecord::Base
  has_many :authentications

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

  # Setup accessible (or protected) attributes for your model
  attr_accessible :email, :password, :password_confirmation
  # attr_accessible :title, :body

  def apply_omniauth(omniauth)
    self.email = omniauth['user_info']['email'] if email.blank?
    authentications.build(:provider => omniauth['provider'], :uid => omniauth['uid'])

  end

  def password_required?
    (authentications.empty? || !password.blank?) && super
  end
end

请阅读最新情况：

我刚刚遇到了下面的RailsCast。 本教程说要运行： rails g nifty:脚手架身份验证user_id:integer \ provider:string :string创建破坏 但是我的机器上没有漂亮的脚手架，我只是跑了 rails g脚手架身份验证user_id:integer \ provider:string :string创建破坏 不同的行为方式。它没有创建存根“索引”、“创建”和“破坏”控制器方法，而是在数据库中创建字段。 我怎样才能移除这些字段？

Answer 1

在您的User.rb行#14中

而不是omniauth['user_info']['email']，它应该是omniauth['info']['email']

对于漂亮发电机，你应该有

gem "nifty-generators", group: :development

在你的Gemfile

尝试rails g scaffold --help查看脚手架生成器的可用选项

您也可以看看这个令人惊叹的rails-cast也是发电机-钢轨-3。

Answer 2

试着替换

omniauth['user_info']['email']

通过

omniauth['email']

您可以使用这样的包装方法

更新:全方位包装器

def omni_conversion(omniauth)
    {
      # Required For Social Network Creation
      access_token: omniauth.credentials.token,
      link: omniauth.extra.raw_info.link,
      provider: omniauth.provider,
      providerid: omniauth.uid,

      # Required For User Creation
      birthday: omniauth.extra.raw_info.birthday,
      email: omniauth.info.email,
      first_name: omniauth.info.first_name,
      gender: omniauth.extra.raw_info.gender,
      last_name: omniauth.info.last_name,
      middle_name: omniauth.info.middle_name,
      picture: omniauth.info.image,
      timezone: omniauth.info.timezone,
      username: omniauth.extra.raw_info.username
     }
  end

omniauth = omni_conversion(omniauth)

优点是你可以直接使用符号。你可以直接把它们传递给模特。