Skip to content

Instantly share code, notes, and snippets.

View jeremysmithco's full-sized avatar

Jeremy Smith jeremysmithco

View GitHub Profile
@peterc
peterc / CONVENTIONS.md
Last active April 23, 2025 06:55
CONVENTIONS.md file for AI Rails 8 development
  • You MUST NOT try and generate a Rails app from scratch on your own by generating each file. For a NEW app you MUST use rails new first to generate all of the boilerplate files necessary.
  • Create an app in the current directory with rails new .
  • Use Tailwind CSS for styling. Use --css tailwind as an option on the rails new call to do this automatically.
  • Use Ruby 3.2+ and Rails 8.0+ practices.
  • Use the default Minitest approach for testing, do not use RSpec.
  • Default to using SQLite in development. rails new will do this automatically but take care if you write any custom SQL that it is SQLite compatible.
  • An app can be built with a devcontainer such as rails new myapp --devcontainer but only do this if requested directly.
  • Rails apps have a lot of directories to consider, such as app, config, db, etc.
  • Adhere to MVC conventions: singular model names (e.g., Product) map to plural tables (products); controllers are plural.
  • Guard against incapable browsers accessing controllers with `allo
@searls
searls / tailwind_class_builder.rb
Created July 3, 2024 17:19
Here's a custom Tailwind FormBuilder for Rails. To set this up, just set ` ActionView::Base.default_form_builder = FormBuilders::TailwindFormBuilder` somewhere (and customize all the CSS classes)
class TailwindClassBuilder
include ActionView::Helpers::TagHelper
def button_classes(options)
button_type = options.delete(:button_type) { :button }
class_names(
# general classes
"mt-4 px-1 sm:px-3 py-sm sm:py-1 font-semibold bg-transparent border rounded",
case button_type

Ruby: The future of frozen string literals

What is a literal?

In programming languages, literals are textual representations of values in the source code. This is a syntactical concept.

Some examples:

7 # integer literal
@mpvosseller
mpvosseller / create_heroku_app.rb
Last active January 2, 2023 19:34
Ruby function to create a new Heroku app with the Heroku Platform API
# Function to create a new Heroku app instance using the ruby Heroku Platform API
#
# Documentation:
# https://devcenter.heroku.com/articles/setting-up-apps-using-the-heroku-platform-api
# https://devcenter.heroku.com/articles/platform-api-reference#app-setup
# https://github.com/heroku/platform-api
# https://heroku.github.io/platform-api
#
# Add the gem 'platform-api'
require "platform-api"