ruby環(huán)境

?  ruby -v
ruby 2.3.3p222 (2016-11-21 revision 56859) [x86_64-darwin15]
?  rails -v
Rails 5.0.2

先建立一個rails項(xiàng)目

rails new blog

在Gemfile里添加

gem 'devise'

然后運(yùn)行

bundle install

安裝好了devise的gem包以后, 安裝devise相關(guān)組件

?  blog/ rails generate devise:install
Running via Spring preloader in process 38288
      create  config/initializers/devise.rb
      create  config/locales/devise.en.yml

還有按照提示去配置

Some setup you must do manually if you haven't yet:

  1. Ensure you have defined default url options in your environments files. Here
     is an example of default_url_options appropriate for a development environment
     in config/environments/development.rb:

       config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }

     In production, :host should be set to the actual host of your application.

  2. Ensure you have defined root_url to *something* in your config/routes.rb.
     For example:

       root to: "home#index"

  3. Ensure you have flash messages in app/views/layouts/application.html.erb.
     For example:

       <p class="notice"><%= notice %></p>
       <p class="alert"><%= alert %></p>

  4. You can copy Devise views (for customization) to your app by running:

       rails g devise:views

/config/environments/development.rb 添加

  # devise setting
  config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }

/config/routes.rb 添加

  root to: "home#index"

/app/views/layout/application.html.erb 添加

    <p class="notice"><%= notice %></p>
    <p class="alert"><%= alert %></p>

輸入命令rails g devise:views 會生成devise的視圖文件

?  blog rails g devise:views
Running via Spring preloader in process 38720
Expected boolean default value for '--markerb'; got :erb (string)
      invoke  Devise::Generators::SharedViewsGenerator
      create    app/views/devise/shared
      create    app/views/devise/shared/_links.html.erb
      invoke  form_for
      create    app/views/devise/confirmations
      create    app/views/devise/confirmations/new.html.erb
      create    app/views/devise/passwords
      create    app/views/devise/passwords/edit.html.erb
      create    app/views/devise/passwords/new.html.erb
      create    app/views/devise/registrations
      create    app/views/devise/registrations/edit.html.erb
      create    app/views/devise/registrations/new.html.erb
      create    app/views/devise/sessions
      create    app/views/devise/sessions/new.html.erb
      create    app/views/devise/unlocks
      create    app/views/devise/unlocks/new.html.erb
      invoke  erb
      create    app/views/devise/mailer
      create    app/views/devise/mailer/confirmation_instructions.html.erb
      create    app/views/devise/mailer/password_change.html.erb
      create    app/views/devise/mailer/reset_password_instructions.html.erb
      create    app/views/devise/mailer/unlock_instructions.html.erb

輸入命令rails g devise user 生成需要用到devise的模型, 路由中會自動生成一個devise_for :users

?  blog rails g devise user
Running via Spring preloader in process 38828
      invoke  active_record
      create    db/migrate/20170424093829_devise_create_users.rb
      create    app/models/user.rb
      invoke    test_unit
      create      test/models/user_test.rb
      create      test/fixtures/users.yml
      insert    app/models/user.rb
       route  devise_for :users

輸入命令rake db:migrate 執(zhí)行遷移文件

?  blog rake db:migrate
== 20170424093829 DeviseCreateUsers: migrating ================================
-- create_table(:users)
   -> 0.0014s
-- add_index(:users, :email, {:unique=>true})
   -> 0.0007s
-- add_index(:users, :reset_password_token, {:unique=>true})
   -> 0.0006s
== 20170424093829 DeviseCreateUsers: migrated (0.0029s) =======================

輸入命令rails generate controller home index 用來設(shè)置root頁面

?  blog rails generate controller home index
Running via Spring preloader in process 39045
      create  app/controllers/home_controller.rb
       route  get 'home/index'
      invoke  erb
      create    app/views/home
      create    app/views/home/index.html.erb
      invoke  test_unit
      create    test/controllers/home_controller_test.rb
      invoke  helper
      create    app/helpers/home_helper.rb
      invoke    test_unit
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/home.coffee
      invoke    scss
      create      app/assets/stylesheets/home.scss

在控制器中, 設(shè)置訪問之前需要登錄

class HomeController < ApplicationController
  before_action :authenticate_user!, :only => [:index, :new]
  def index
  end
end

解釋一下:
user_signed_in? //判斷用戶是否登錄
current_user //獲取當(dāng)前登錄用戶
user_session //可以訪問對應(yīng)的session

現(xiàn)在可以跑一下rails s 來看看效果
訪問默認(rèn)頁 http://127.0.0.1:3000/ 會被路由到 http://127.0.0.1:3000/users/sign_in

你將看到以下簡陋的頁面, 實(shí)現(xiàn)了最簡單的用戶系統(tǒng).
注冊頁(users/sign_up),
登入頁(users/sign_in),
忘記密碼頁(users/password/new)

登錄之后, devise默認(rèn)跳轉(zhuǎn)到了root, 要自定義, 去覆蓋after_sign_in_path_for和after_sign_out_path_for來自定義跳轉(zhuǎn)回調(diào)

待續(xù)寫

Reference

http://www.reibang.com/p/8dfff067197d