Question

这很简单，我想在我的rails应用程序中使用omniauth和devise链接到他现有的用户帐户他的facebook个人资料（优先考虑最初注册的电子邮件）。

我已阅读this，但对我没什么帮助。

我目前的结构是like this one。

Answer 1

以下是我如何实现此功能的示例。如果用户已登录，则我会调用将其帐户与Facebook相关联的方法。否则，我将执行Devise-Omniauth wiki page中列出的相同步骤。

# users/omniauth_callbacks_controller.rb

def facebook
  if user_signed_in?
    if current_user.link_account_from_omniauth(request.env["omniauth.auth"])
      flash[:notice] = "Account successfully linked"
      redirect_to user_path(current_user) and return
    end
  end

  @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

# app/models/user.rb

class << self
  def from_omniauth(auth)
    new_user = where(provider: auth.provider, uid: auth.uid).first_or_initialize
    new_user.email = auth.info.email

    new_user.password = Devise.friendly_token[0,20]
    new_user.skip_confirmation!
    new_user.save
    new_user
  end
end

def link_account_from_omniauth(auth)
  self.provider = auth.provider
  self.uid = auth.uid
  self.save
end

将Facebook链接到现有帐户/ omniauth

1 个答案: