/new

Create new Rails app: $ARGUMENTS

Rails New Command

Generate a new Rails application with customized options based on the request.

Basic Usage

rails new app_name [options]

Common Options

Option	Description
--database=DATABASE	Preconfigure database (postgresql, mysql, sqlite3)
--api	API-only application (no views/assets)
--minimal	Minimal Rails app (fewer defaults)
--skip-test	Skip test files
--skip-system-test	Skip system test files
--skip-action-mailer	Skip Action Mailer
--skip-action-mailbox	Skip Action Mailbox
--skip-action-text	Skip Action Text
--skip-active-storage	Skip Active Storage
--skip-action-cable	Skip Action Cable
--skip-hotwire	Skip Hotwire (Turbo + Stimulus)
--skip-jbuilder	Skip Jbuilder
--skip-bundle	Don't run bundle install
--css=FRAMEWORK	CSS framework (tailwind, bootstrap, bulma, postcss, sass)
--javascript=BUNDLER	JS approach (importmap, esbuild, rollup, webpack)
--skip-javascript	Skip JavaScript

Database Options

# PostgreSQL (recommended for production)
rails new myapp --database=postgresql

# MySQL
rails new myapp --database=mysql

# SQLite (default)
rails new myapp

Common Configurations

Full-stack app with PostgreSQL and Tailwind:

rails new myapp --database=postgresql --css=tailwind

API-only app:

rails new myapp --api --database=postgresql

Minimal app:

rails new myapp --minimal --database=postgresql

Skip testing (using RSpec instead):

rails new myapp --database=postgresql --skip-test

Modern full-stack with esbuild:

rails new myapp --database=postgresql --javascript=esbuild --css=tailwind

Interpretation Guide

Based on user request, determine:

1. App name: Extract from arguments or ask
2. Database: Default to PostgreSQL for most apps, SQLite for tutorials/simple apps
3. CSS framework: If user mentions Tailwind, Bootstrap, etc.
4. API mode: If user mentions "API", "backend only", "no frontend"
5. Skip options: Based on what features they don't need

After Creation

After running rails new, suggest:

1. cd app_name
2. rails db:create
3. For PostgreSQL: Ensure PostgreSQL is running
4. Consider adding useful gems (devise, sidekiq, etc.) based on requirements

Generate the appropriate rails new command based on the user's request.