用户的未定义方法“设计”（调用“ User.connection”以建立连接）：类

Question

我有这个问题

undefined method `devise' for User (call 'User.connection' to establish a connection):Class

这里的每个答案指出下面的命令未运行

rails generate devise:install

但是我实际上完成了安装devise gem的过程，还添加了omniauth-facebook gem，它可以工作几次。但是，当我尝试提交并加载我的生产站点时，它就会中断，这就是错误所在，然后我回到我的测试站点，无论如何，它也会中断，这是完整的代码

gemfile：

gem 'rails', '~> 5.0.2'
gem 'puma', '~> 3.0'
gem 'sass', '~> 3.5', '>= 3.5.1'
gem 'sass-rails', '~> 5.0.4'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.2'
gem 'autoprefixer-rails', '~> 7.1', '>= 7.1.3'
gem 'jquery-rails'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.5'
gem 'devise'
gem 'bootstrap', '~> 4.0.0.beta'
gem 'font-awesome-rails', '~> 4.7', '>= 4.7.0.1'
gem 'country_select'
gem 'carrierwave', '~> 0.11.2'
gem 'carrierwave-base64'
gem 'fog-aws'
gem 'fog'
gem 'figaro', '~> 1.1', '>= 1.1.1'
gem 'acts_as_follower', github: 'tcocca/acts_as_follower', branch: 'master'
gem 'faker', '~> 1.6', '>= 1.6.3'
gem 'acts_as_votable', '~> 0.10.0'
gem 'omniauth'
gem 'omniauth-facebook'
gem 'sprockets-rails', '~> 3.1', '>= 3.1.1'

路线：

Rails.application.routes.draw do
  resources :items do
    member do
      put "vote", to: "items#vote"
    end
  end
  resources :profiles
  resources :relationships, only: [:create, :destroy]


  devise_for :users, :controllers => { :omniauth_callbacks => "users/omniauth_callbacks" }
  resources :users do
    member do
      get :following, :followers
    end
  end

  get 'pages/wish'

  devise_scope :user do
    authenticated :user do
      root to: 'pages#index', as: :authenticated_root
    end

    unauthenticated do
      root 'devise/sessions#new', as: :unauthenticated_root
    end
  end

  namespace 'api' do
    namespace 'v1' do
      resources :items
    end
  end


end

devise.rb：这是我添加到Devise.rb的唯一代码

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

User.rb：

devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable,
         :omniauthable, omniauth_providers: [:facebook]

def has_facebook_linked?
    self.provider.present? && self.uid.present?
  end

  def apply_omniauth(auth)
    update_attributes(
      provider: auth.provider,
      uid: auth.uid
    )
  end

  def self.from_omniauth(auth)
    where(provider: auth.provider, uid: auth.uid).first_or_create do |user|
      user.email = auth.info.email
      user.provider = auth.provider
      user.uid = auth.uid
      user.password = Devise.friendly_token[0,20]
    end
  end

OmniauthCallbacksController：

class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
    def facebook
        if current_user.present?
            current_user.apply_omniauth(request.env["omniauth.auth"])
            redirect_to edit_user_registration_path, notice: "Facebook Account Linked!"
        else
            @user = User.from_omniauth(request.env["omniauth.auth"])
            sign_in_and_redirect @user
        end
    end
end

Answer 1

我自己解决了这个问题，所以我要做的就是添加这个标签

extend Devise::Models

在我的user.rb文件中

user.rb文件如下所示

class User < ApplicationRecord
  extend Devise::Models

# more code bellow....
end