Add Scaffold Auth Functionality With Rails 8 Generator as a Rails TIL

Author: jbranchaud

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1566 TILs and counting..._
+_1567 TILs and counting..._
 
 See some of the other learning resources I work on:
 - [Ruby Operator Lookup](https://www.visualmode.dev/ruby-operators)
@@ -1056,6 +1056,7 @@ See some of the other learning resources I work on:
 - [Run A Rake Task Programmatically](rails/run-a-rake-task-programmatically.md)
 - [Run Commands With Specific Rails Version](rails/run-commands-with-specific-rails-version.md)
 - [Run Some Code Whenever Rails Console Starts](rails/run-some-code-whenever-rails-console-starts.md)
+- [Scaffold Auth Functionality With Rails 8 Generator](rails/scaffold-auth-functionality-with-rails-8-generator.md)
 - [Schedule Sidekiq Jobs Out Into The Future](rails/schedule-sidekiq-jobs-out-into-the-future.md)
 - [Secure Passwords With Rails And Bcrypt](rails/secure-passwords-with-rails-and-bcrypt.md)
 - [Select A Select By Selector](rails/select-a-select-by-selector.md)

rails/scaffold-auth-functionality-with-rails-8-generator.md

@@ -0,0 +1,44 @@
+# Scaffold Auth Functionality With Rails 8 Generator
+
+Rails 8 added a built-in generator for authentication that scaffolds the core
+models, controllers, views, routes, etc. needed for a basic email/password
+authentication flow. It creates a `User` model, if one doesn't already exist,
+as the authenticated object. It uses the `bcrypt` gem for password hashing,
+etc.
+
+Here is an example of what you get when running the generator on a relatively
+new Rails 8 project:
+
+```bash
+$ bin/rails generate authentication
+      invoke  tailwindcss
+      create    app/views/passwords/new.html.erb
+      create    app/views/passwords/edit.html.erb
+      create    app/views/sessions/new.html.erb
+      create  app/models/session.rb
+      create  app/models/user.rb
+      create  app/models/current.rb
+      create  app/controllers/sessions_controller.rb
+      create  app/controllers/concerns/authentication.rb
+      create  app/controllers/passwords_controller.rb
+      create  app/channels/application_cable/connection.rb
+      create  app/mailers/passwords_mailer.rb
+      create  app/views/passwords_mailer/reset.html.erb
+      create  app/views/passwords_mailer/reset.text.erb
+      create  test/mailers/previews/passwords_mailer_preview.rb
+      insert  app/controllers/application_controller.rb
+       route  resources :passwords, param: :token
+       route  resource :session
+        gsub  Gemfile
+      bundle  install --quiet
+    generate  migration CreateUsers email_address:string!:uniq password_digest:string! --force
+       rails  generate migration CreateUsers email_address:string!:uniq password_digest:string! --force
+      invoke  active_record
+      create    db/migrate/20250115224625_create_users.rb
+    generate  migration CreateSessions user:references ip_address:string user_agent:string --force
+       rails  generate migration CreateSessions user:references ip_address:string user_agent:string --force
+      invoke  active_record
+      create    db/migrate/20250115224626_create_sessions.rb
+```
+
+[source](https://www.bigbinary.com/blog/rails-8-introduces-a-basic-authentication-generator)