$ rails new アプリケーション名 [オプション]

$ rails new weblog

$ rails new weblog -d mysql

$ rails new weblog --api

$ rails _6.1.4_ new weblog

$ rails generate scaffold 名前 [カラム名:型[:index]..] [オプション]

$ rails generate scaffold post

$ rails generate scaffold post title:string body:text published:boolean

$ rails generate scaffold_controller 名前 [カラム名:型..] [オプション]

$ rails generate scaffold_controller CreditCard

$ rails generate controller 名前 [アクション名..] [オプション]

$ rails generate controller Page

$ rails generate controller page title

$ rails generate controller 'admin/page'

$ rails generate migration 名前 [カラム名:型[:index]..] [オプション]

class マイグレーション名s < ActiveRecord::Migration
  def up
  end

  def down
  end
end

$ rails generate migration Page

$ rails generate migration AddTitleToPage title:string

$ rails generate model 名前 [カラム名:型[:index]..] [オプション]

$ rails generate model user

$ rails generate model admin/account

$ rails generate model user pseudo:string{30}

$ rails generate model user pseudo:string:index

$ rails generate model user pseudo:string:uniq

$ rails generate application_record [オプション]

$ rails generate application_record

$ rails generate helper 名前 [オプション]

$ rails generate helper CreditCard

$ rails generate helper credit_card

$ rails generate resource 名前 [カラム名[:型][:index]..] [オプション]

$ rails generate resource post

$ rails generate resource post title:string body:text published:boolean

$ rails generate channel 名前 [メソッド..] [オプション]

$ rails generate channel Chat speak

$ rails generate integration_test 名前 [オプション]

$ rails generate integration_test GeneralStories

$ rails generate system_test 名前 [オプション]

$ rails generate system_test GeneralStories

$ rails generate jbuilder 名前 [フィールド:型..] [オプション]

$ rails generate jbuilder hoge

$ rails generate job 名前 [オプション]

$ rails generate job hoge

$ rails generate mailbox 名前 [オプション]

$ rails generate mailbox inbox

$ rails generate mailer 名前 [メソッド..] [オプション]

$ rails generate mailer Notifications signup forgot_password invoice

$ rails generate benchmark ファイル名

$ rails generate benchmark opt_compare

$ rails generate task 名前 [アクション..] [オプション]

$ rails generate task feeds fetch erase add

$ rails destroy ファイルの種類 [削除するファイル名] [オプション]

 $ rails d ファイルの種類 [削除するファイル名[ [オプション]

$ rails destroy controller hello

$ rails destroy migration AddSslFlag

$ rails db:create [RAILS_ENV=環境(development, text, production)]

$ rails db:create:all

$ rails db:create

$ rails db:create RAILS_ENV=production

$ rails db:drop [RAILS_ENV=環境(development, text, production)]

$ rails db:drop:all

$ rails db:drop

$ rails db:drop RAILS_ENV=production

$ rails db:migrate [VERSION=バージョン番号 オプション]

$ rails db:migrate

$ rails db:migrate RAILS_ENV=production

$ rails db:migrate RAILS_ENV=test

$ rails db:migrate VERSION=201010190000

$ rails db:migrate:reset

$ rails db:migrate:redo STEP=1

$ rails db:migrate:up VERSION=201010190000

$ rails db:version

$ rails db:encryption:init

$ rails db:encryption:init

$ rails db:environment:set

$ rails db:environment:set

$ rails db:fixtures:load

$ rails db:fixtures:load

$ rails dbconsole [オプション]

$ rails db [オプション]

$ rails dbconsole

$ rails db:version [RAILS_ENV=環境(development, text, production)]

$ rails db:version

$ rails db:schema:load [RAILS_ENV=環境(development, text, production)]

$ rails db:schema:load

$ rails db:schema:dump [RAILS_ENV=環境(development, text, production)]

$ rails db:schema:dump

$ rails db:schema:cache:clear

$ rails db:schema:cache:clear

$ rails db:schema:cache:dump

$ rails db:schema:cache:dump

$ rails db:seed

# db/seeds.rb
Category.create(name: "Railsの基礎知識", position: 1)
Category.create(name: "Rubyの基礎知識", position: 2)

# db/seeds.rb
5.times do |i|
     Page.create(name: "テスト #{i}", category_id: 1)
end

$ rails db:seed:replant

$ rails db:seed:replant

$ rails db:prepare

$ rails db:prepare

$ rails db:reset

$ rails db:reset

$ rails db:rollback

$ rails db:rollback

$ rails db:setup

$ rails db:setup

$ rails db:structure:dump [SCHEMA=ダンプするファイルパス(db/my_structure.sql)]

$ rails db:structure:dump

$ rails db:structure:load

$ rails db:structure:load

$ rails db:system:change [--to=使用するデータベース]

$ rails db:system:change --to=mysql

$ rails assets:clean

$ rails assets:clean

$ rails assets:clobber

$ rails assets:clobber

$ rails assets:environment

$ rails assets:environment

$ rails assets:precompile

$ rails assets:precompile

$ rails plugin new パス [オプション]

$ rails plugin new ~/Code/Ruby/blog

$ rails server -u [Rackサーバーを指定(thin/puma/webrick)] [オプション]

$ rails s [オプション]

$ rails server

$ rails server --p=3001

$ rails server --d

$ rails server -e production

$ rails s

$ rails console [オプション]

$ rails console
Loading development environment (Rails x.x.x)
irb(main):001:0>

$ rails console production
Loading production environment (Rails x.x.x)
irb(main):001:0>

$ rails console
irb(main):001:0> ActiveRecord::Base.logger = Logger.new(STDOUT)

>> app.root_path
# "/"

>> helper.hoge

$ rails console --sandbox

$ rails runner 実行するコード [オプション]

$ rails r 実行するコード [オプション]

$ rails runner "Model.hoge_method"

$ rails runner path/to/filename.rb

$ rails runner -

$ rails about

$ rails about

$ rails version

$ rails version

$ rails notes [オプション]

$ rails notes

$ rails routes [オプション]

$ rails routes

$ rails action_mailbox:ingress:exim

$ rails action_mailbox:ingress:exim

$ rails action_mailbox:ingress:postfix

$ rails action_mailbox:ingress:postfix

$ rails action_mailbox:ingress:qmail

$ rails action_mailbox:ingress:qmail

$ rails action_mailbox:install

$ rails action_mailbox:install

$ rails action_mailbox:install:migrations

$ rails action_mailbox:install:migrations

$ rails action_text:install

$ rails action_text:install

$ rails action_text:install:migrations

$ rails action_text:install:migrations

$ rails active_storage:install

$ rails active_storage:install

$ rails app:template

$ rails app:template

$ rails app:update

$ rails app:update

$ rails cache_digests:dependencies

$ rails cache_digests:dependencies

$ rails cache_digests:nested_dependencies

$ rails cache_digests:nested_dependencies

$ rails dev:cache

$ rails dev:cache

$ rails importmap:install

$ rails importmap:install

$ rails initializers [オプション]

$ rails initializers

$ rails log:clear

$ rails log:clear

$ rails middleware

$ rails middleware

$ rails restart

$ rails restart

$ rails secret

$ rails secret

$ rails stats

$ rails stats

$ rails stimulus:install

$ rails stimulus:install

$ rails stimulus:install:importmap

$ rails stimulus:install:importmap

$ rails stimulus:install:node

$ rails stimulus:install:node

$ rails test [オプション] [ファイルかディレクトリ..]

$ rails test test/models/article_test.rb

$ rails test test/models

$ rails test test/models/user_test.rb:27

$ rails test test/controllers test/integration/login_test.rb

$ rails test:db

$ rails test:db

$ rails test:all

$ rails test:all

$ rails time:zones

$ rails time:zones

$ rails tmp:clear

$ rails tmp:clear

$ rails tmp:create

$ rails tmp:create

$ rails turbo:install

$ rails turbo:install

$ rails turbo:install:importmap

$ rails turbo:install:importmap

$ rails turbo:install:node

$ rails turbo:install:node

$ rails turbo:install:redis

$ rails turbo:install:redis

$ rails yarn:install

$ rails yarn:install

$ rails zeitwerk:check

$ rails zeitwerk:check