This is how I start Rails applications. I avoid straying too far from default/upcoming Rails configurations.

Creating a new Rails application

rails new <name> --database=postgresql --asset-pipeline=propshaft --css=tailwind

Why PostgreSQL?

It’s what I know best and has features that I miss when I last used MySQL. I’m also interested in using SQLite in production but I haven’t explored that enough.

Why Propshaft?

The days of Webpack/Webpacker are behind us and I appreciate the simplicity of Propshaft over Sprockets. I also prefer to keep frontend dependencies to a minimum and hope to eventually approach “no-build”.

Why Tailwind CSS?

I know just enough CSS to be dangerous and I’m more productive with Tailwind CSS than without. There are downsides, however, and I would like to eventually need only vanilla CSS.

Setting up a new Rails application

Rubocop Rails Omakase

https://github.com/rails/rubocop-rails-omakase

# Gemfile
gem "rubocop-rails-omakase", require: false, group: [ :development ]

> bundle
> bundle binstubs rubocop

# .rubocop.yml
inherit_gem:
  rubocop-rails-omakase: rubocop.yml

> bin/rubocop -a

Disable Rails helper generators

In config/application.rb:

module YourApp
  class Application < Rails::Application
    config.generators do |g|
      g.helper false
    end
  end
end