Rails设计单表继承user_signed_in？总是假的，current_user总是为零

Question

我试着这样做。

Devise single table inheritance

之后，我使用/ admin / sign_in登录，在控制器中创建断点。我发现current_user总是返回nil，user_signed_in？总是假的。

有人能帮助我吗？

# model
class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  #attr_accessible :name, :email, :password, :password_confirmation
end

class Customer < User
end

class Restaurant < User
end

class Admin < Customer
end

class Staff < Customer
end

# application_controller.rb
class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception

  # Devise helper configuration
  helper_method :current_admin, :current_restaurant, :current_staff,
    :require_admin!, :require_restaurant!, :require_staff!

  include DeviseModule
end

# concern/devise_module.rb
module DeviseModule
  def account_url
    return new_user_session_url unless user_signed_in?
    case current_user.class.name
    when "Admin"
      admins_root_url
    when "Staff"
      staffs_root_url
    when "Restaurant"
      restaurants_root_url
    else
      root_url
    end if user_signed_in?
  end

  def after_sign_in_path_for(resource)
    stored_location_for(resource) || account_url
  end

  private

  def current_admin
    @current_admin ||= current_user if user_signed_in? and current_user.class.name == "Admin"
  end

  def current_staff
    @current_staff ||= current_user if user_signed_in? and current_user.class.name == "Staff"
  end

  def current_restaurant
    @current_restaurant ||= current_user if user_signed_in? and current_user.class.name == "Restaurant"
  end

  def admin_logged_in?
    @admin_logged_in ||= user_signed_in? and current_admin
  end

  def staff_logged_in?
    @Buyer_logged_in ||= user_signed_in? and current_staff
  end

  def restaurant_logged_in?
    @seller_logged_in ||= user_signed_in? and current_restaurant
  end

  def require_admin
    require_user_type(:admin)
  end

  def require_staff
    require_user_type(:staff)
  end

  def require_restaurant
    require_user_type(:restaurant)
  end

  def require_user_type(user_type)
    if (user_type == :admin and !admin_logged_in?) or
      (user_type == :staff and !staff_logged_in?) or
      (user_type == :restaurant and !restaurant_logged_in?)
      redirect_to root_path, status: 301, notice: "You must be logged in a#{'n' if user_type == :admin} #{user_type} to access this content"
      return false
    end
  end
end

# router.rb
Rails.application.routes.draw do

  devise_for :users
  devise_for :admins, :skip => [:registrations]
  devise_for :restaurants
  devise_for :staffs

  scope :module => :home do

    scope :orders do
      get "/", :to => "order#index"
      get "/checkout", :to => "order#checkout"
      post "/checkout", :to => "order#create_an_order", :as => "order_checkout"
    end

    root :to => "home#index"

  end

  namespace :admins do
    resources :restaurant 
    root :to => "restaurant#index"
  end

  namespace :staffs do
    root :to => "staff#index"
  end

  namespace :restaurants do
    root :to => "retaurant#index"
  end
end