{"id":7419,"date":"2015-12-21T11:16:30","date_gmt":"2015-12-21T11:16:30","guid":{"rendered":"https:\/\/dev.railscarma.com\/unlocking-the-devise-gem\/"},"modified":"2026-01-01T06:58:34","modified_gmt":"2026-01-01T06:58:34","slug":"unlocking-the-devise-gem","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/%e6%8a%80%e8%a1%93%e8%ab%96%e6%96%87\/unlocking-the-devise-gem\/","title":{"rendered":"Rails 8\u3067\u300cDevise\u300d\u30b8\u30a7\u30e0\u3092\u30a2\u30f3\u30ed\u30c3\u30af\u3059\u308b"},"content":{"rendered":"
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<\/p>\n

If we have to don our wizarding hat and take out our crystal balls, we would still be harping that Ruby on Rails is going to be hot in 2026 too! 2026 is also going to bring in only 24 hours a day (how we wish, we could stretch the time) and time would still spell money for businesspeople. When time is money, anything which can save time is gold! And that\u2019s where Ruby on Rails come in picture. What could take other programming languages months to complete, takes only weeks, sometimes just days for Ruby on Rails. Shaping ideas into applications was never so easy. With Ruby on Rails, agility is the norm and convention over configuration the benchmark. And what make Ruby on Rails more powerful are the bunch of pre-packaged, categorized, reusable codes, named as gems. With gems, Rails is a super power to behold. One of the most popular gems is called as Devise Gems, which is a complete authentication package. Read on to know more about Devise gem.<\/p>\n

Introducing Devise for Ruby on Rails 8<\/b><\/h2>\n

Devise is a widely used authentication library for Ruby on Rails 8 applications, built on top of Warden<\/strong>, a Rack-based authentication framework.<\/p>\n

Warden manages user sessions by securely validating the identity of authenticated users. It also ensures that unauthenticated users are restricted from accessing protected routes and resources within a Rails application.<\/p>\n

Since Warden operates strictly at the Rack level, it does not provide Rails-specific features such as controllers, views, helpers, or configuration generators required for a complete authentication system. Devise bridges this gap by adding these Rails integrations, making it easier to implement a robust and production-ready authentication solution in Rails 8.<\/p>\n

A major advantage of Devise is its modular architecture. It includes around ten authentication modules that allow you to customize how authentication behaves in your application. You can enable only the modules you need\u2014such as Registerable, Omniauthable, Trackable, and others\u2014keeping your authentication setup clean and flexible.<\/p>\n

\u00a0<\/p>\n

With this understanding, we can now begin building our Tasks application and set up Devise in a Rails 8 environment.<\/p>\n

<\/p>\n

<\/p>\n

\u300c\u30c7\u30d0\u30a4\u30b9\u300d\u30b8\u30a7\u30e0\u3068\u306f\u4f55\u3067\u3059\u304b?<\/strong><\/h2>\n

<\/p>\n

<\/p>\n

    \n
  1. Devise \u306f\u3001Rails \u7528\u306e\u5f37\u529b\u304b\u3064\u67d4\u8edf\u306a\u8a8d\u8a3c\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u3059\u3002<\/li>\n
  2. \u3053\u308c\u306f\u5b8c\u5168\u306b MVC \u69cb\u9020\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002<\/li>\n
  3. \u8907\u6570\u306e\u30e2\u30c7\u30eb\u3092\u540c\u6642\u306b\u30b5\u30a4\u30f3\u30a4\u30f3\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n

    <\/p>\n

    <\/p>\n

    Device\u306e\u3055\u307e\u3056\u307e\u306a\u30e2\u30b8\u30e5\u30fc\u30eb<\/strong><\/h2>\n

    <\/p>\n

    <\/p>\n

    Devise \u306f 10 \u500b\u306e\u91cd\u8981\u306a\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

    <\/p>\n

    <\/p>\n

      \n
    1. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a8d\u8a3c\u53ef\u80fd: \u30b5\u30a4\u30f3\u30a4\u30f3\u6642\u306b\u30e6\u30fc\u30b6\u30fc\u306e\u4fe1\u983c\u6027\u3092\u691c\u8a3c\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u6697\u53f7\u5316\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002\u8a8d\u8a3c\u306f\u3001POST \u30ea\u30af\u30a8\u30b9\u30c8\u307e\u305f\u306f HTTP \u57fa\u672c\u8a8d\u8a3c\u306e\u4e21\u65b9\u3092\u901a\u3058\u3066\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/li>\n
    2. \u30aa\u30e0\u30cb\u30a2\u8a8d\u8a3c\u53ef\u80fd: \u8ffd\u52a0\u00a0\u30aa\u30e0\u30cb\u8a8d\u8a3c<\/a>\u00a0\u30b5\u30dd\u30fc\u30c8\u3001\u3064\u307e\u308a OmniAuth \u306b\u3088\u308b\u30ed\u30b0\u30a4\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/li>\n
    3. \u78ba\u8a8d\u53ef\u80fd: \u78ba\u8a8d\u624b\u9806\u3092\u8a18\u8f09\u3057\u305f\u96fb\u5b50\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3001\u30b5\u30a4\u30f3\u30a4\u30f3\u6642\u306b\u30a2\u30ab\u30a6\u30f3\u30c8\u304c\u3059\u3067\u306b\u78ba\u8a8d\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/li>\n
    4. \u56de\u5fa9\u53ef\u80fd: \u30e6\u30fc\u30b6\u30fc\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u30ea\u30bb\u30c3\u30c8\u3057\u3001\u30ea\u30bb\u30c3\u30c8\u624b\u9806\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/li>\n
    5. \u767b\u9332\u53ef\u80fd: \u30e6\u30fc\u30b6\u30fc\u304c\u30b5\u30a4\u30f3\u30a2\u30c3\u30d7\u3059\u308b\u3053\u3068\u3067\u767b\u9332\u30d7\u30ed\u30bb\u30b9\u3092\u51e6\u7406\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u81ea\u5206\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u7de8\u96c6\u304a\u3088\u3073\u7834\u68c4\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/li>\n
    6. \u8a18\u61b6\u53ef\u80fd: \u540d\u524d\u304c\u793a\u3059\u3088\u3046\u306b\u3001\u4fdd\u5b58\u3055\u308c\u305f Cookie \u3092\u901a\u3058\u3066\u30e6\u30fc\u30b6\u30fc\u3092\u8a18\u61b6\u3059\u308b\u305f\u3081\u306e\u30c8\u30fc\u30af\u30f3\u306e\u7ba1\u7406\u3001\u751f\u6210\u3001\u30af\u30ea\u30a2\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/li>\n
    7. \u8ffd\u8de1\u53ef\u80fd: \u30b5\u30a4\u30f3\u30a4\u30f3\u6570\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001IP \u30a2\u30c9\u30ec\u30b9\u3092\u8ffd\u8de1\u3057\u307e\u3059\u3002<\/li>\n
    8. \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u53ef\u80fd<\/a>: \u6307\u5b9a\u3055\u308c\u305f\u671f\u9593\u30a2\u30af\u30c6\u30a3\u30d6\u3067\u306a\u304b\u3063\u305f\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u671f\u9650\u5207\u308c\u306b\u3057\u307e\u3059\u3002<\/li>\n
    9. \u691c\u8a3c\u53ef\u80fd: \u96fb\u5b50\u30e1\u30fc\u30eb\u3068\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u691c\u8a3c\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u308b\u305f\u3081\u3001\u72ec\u81ea\u306e\u691c\u8a3c\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<\/li>\n
    10. \u30ed\u30c3\u30af\u53ef\u80fd: \u30b5\u30a4\u30f3\u30a4\u30f3\u8a66\u884c\u304c\u7279\u5b9a\u306e\u56de\u6570\u5931\u6557\u3057\u305f\u5f8c\u306b\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u30ed\u30c3\u30af\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u30a2\u30ab\u30a6\u30f3\u30c8\u306f\u96fb\u5b50\u30e1\u30fc\u30eb\u7d4c\u7531\u3067\u3001\u307e\u305f\u306f\u7279\u5b9a\u306e\u671f\u9593\u5f8c\u306b\u30ed\u30c3\u30af\u3092\u89e3\u9664\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n

      <\/p>\n

      <\/p>\n

      \u30c7\u30d0\u30a4\u30b9\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3001\u30e2\u30c7\u30eb\u306e\u4f5c\u6210\u3001\u8868\u793a\u3068\u69cb\u6210<\/strong><\/h2>\n

      <\/p>\n

      <\/p>\n

        \n
      1. Rails \u30a2\u30d7\u30ea\u3092\u4f5c\u6210\u3059\u308b<\/li>\n
      2. gem 'devise' \u3092 Gemfile \u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/li>\n
      3. \u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067\u30d0\u30f3\u30c9\u30eb\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>\n
      4. \u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067\u300crails generated Device:install\u300d\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>\n
      5. Execute rails generate devise <Model Name> in your command line to create model<\/li>\n<\/ol>\n
        \n
        Run the following command:<\/b><\/div>\n
        \u00a0<\/div>\n
        rails generate devise User<\/pre>\n
        After running this command, a user.rb model will be generated in the app\/models directory.<\/div>\n
        \u00a0<\/div>\n
        class User < ApplicationRecord\n  # Include default Devise modules.\n  # Other available modules are:\n  # :confirmable, :lockable, :timeoutable, and :omniauthable
        \u00a0 devise :database_authenticatable,
        \u00a0 \u00a0 \u00a0 \u00a0 \u00a0:registerable,
        \u00a0 \u00a0 \u00a0 \u00a0 \u00a0:recoverable,
        \u00a0 \u00a0 \u00a0 \u00a0 \u00a0:rememberable,
        \u00a0 \u00a0 \u00a0 \u00a0 \u00a0:trackable,
        \u00a0 \u00a0 \u00a0 \u00a0 \u00a0:validatable
        \u7d42\u308f\u308a<\/pre>\n<\/div>\n
          \n
        1. \u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u79fb\u884c\u30d5\u30a1\u30a4\u30eb\u3092\u5909\u66f4\u3067\u304d\u307e\u3059\u3002\u6b21\u306b\u3001 rake db:merge \u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>\n
        2. \u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067railsgenerate Device:views\u3092\u5b9f\u884c\u3057\u3066\u30d3\u30e5\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3059<\/li>\n
        3. \u5404\u74b0\u5883\u3067 Devise \u30e1\u30fc\u30e9\u30fc\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306e URL \u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 config\/environments\/development.rb \u306e\u4f8b: config.action_mailer.default_url_options = { host: 'localhost'\u3001port: 3000 }<\/li>\n<\/ol>\n
          <\/p>\n
          <\/p>\n
          \u8981\u4ef6\u306b\u5fdc\u3058\u3066\u30e2\u30c7\u30eb\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3001\u30d3\u30e5\u30fc\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u307e\u3059\u3002\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001github \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
          <\/p>\n
          <\/p>\n
          \u4e00\u90e8\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc \u30d5\u30a3\u30eb\u30bf\u30fc\u3068\u30d8\u30eb\u30d1\u30fc<\/strong><\/h2>\n
          <\/p>\n
          <\/p>\n