我已经成功地用omniauth-facebook实现了Devise，现在正在尝试Twitter。我几乎已经将Facebook的Devise设置复制到Twitter的方法中。但是，在成功批准我的应用程序使用我的 Twitter 帐户后，我被重定向回我的用户注册页面 （http://localhost:3000/users/sign_up）。这是为什么呢？
控制台输出
Started GET "/users/auth/twitter/callback?oauth_token=zeIyTgAAAAAAwAQEAAABVcusPxc&oauth_verifier=q24BAAziukc8bF6nnaxuRoouuGaPuoF3" for ::1 at 2016-07-08 14:01:51 -0400
I, [2016-07-08T14:01:51.984997 #44805] INFO -- omniauth: (twitter) Callback phase initiated.
Processing by Users::OmniauthCallbacksController#twitter as HTML
Parameters: {"oauth_token"=>"zeIyTgAAAAAAwAQEAAABVcusPxc", "oauth_verifier"=>"q24BAAziukc8bF6nnaxuRoouuGaPuoF3"}
User Load (0.7ms) SELECT "users".* FROM "users" WHERE "users"."provider" = $1 AND "users"."uid" = $2 ORDER BY "users"."id" ASC LIMIT 1 [["provider", "twitter"], ["uid", "248829852"]]
(0.2ms) BEGIN
(0.1ms) ROLLBACK
Redirected to http://localhost:3000/users/sign_up
Completed 302 Found in 165ms (ActiveRecord: 1.0ms)
控制器/用户/omniauth_callbacks_controller.rb
类用户::OmniAuthCallbacksController
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
def twitter
@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 => "Twitter") if is_navigational_format?
else
session["devise.twitter_data"] = request.env["omniauth.auth"].except("extra")
redirect_to new_user_registration_url
end
end
def failure
redirect_to root_path
end
end
models/user.rb
class User < ActiveRecord::Base
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable,
:omniauthable, :omniauth_providers => [:facebook, :twitter]
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.name = auth.info.name # assuming the user model has a name
user.image = auth.info.image # assuming the user model has an image
end
end
end
config/routes.rb
Rails.application.routes.draw do
devise_for :users,
:controllers => { :omniauth_callbacks => "users/omniauth_callbacks" }
root 'welcome#index'
end
像这样将调试输出添加到您的twitter回调中，以查看阻止事务提交的确切错误：
def twitter
@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 => "Twitter") if is_navigational_format?
else
session["devise.twitter_data"] = request.env["omniauth.auth"].except("extra")
puts @user.errors
redirect_to new_user_registration_url
end
end
众所周知，Twitter在注册时不需要电子邮件，因此在对这样的帐户进行oauth时，它可能不会返回值。
对于问题，Devise 默认为某些字段提供自动验证。来自设计来源：
def self.included(base)
base.extend ClassMethods
assert_validations_api!(base)
base.class_eval do
validates_presence_of :email, if: :email_required?
要关闭默认电子邮件状态验证，请将其放入用户模型中：
def email_required?
false
end
根据您的使用情况，您可能还希望将默认身份验证密钥更改为不使用电子邮件：
在配置/初始化/devise.rb：
config.authentication_keys = [ :username ]
更新
当使用Devise提供的生成器时，user表可能会在email字段上出现null:false约束。要删除它，请使用以下项创建迁移：
change_column :users, :email, :string, :null => true
并更新数据库架构：
bundle exec rake db:migrate
我一直在努力解决同样的错误，使用 Github 身份验证，最后通过在 devise.rb 中的 config.omniauth 中添加范围，它奏效了！也许它需要范围用户来检索电子邮件和其他信息
config.omniauth :github, ENV['GITHUB_APP_ID'], ENV['GITHUB_APP_SECRET'], scope: 'repo,user'
