peterc

• 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

Thomascountz

require 'benchmark/ips'

PointStruct = Struct.new(:x, :y, :grayscale)

PointData = Data.define(:x, :y, :grayscale)

class PointClass
  attr_accessor :x, :y, :grayscale

  def initialize(x, y, grayscale)

thiagofm

# Creating a complex hash, with nested keys 
my_complex_hash = {
  users: [
    {name: "Yukihiro Matsumoto", age: 57},
    {name: "Kabosu the Shiba Inu", age: 16},
    {name: "Thiago Massa", age: 33}
  ]
}

super-dog-human

Environments

• M1 mac
• Ruby 2.7.4
• Rails 6(latest)
• MySQL 5.7

Files

Dockerfile

mdang

Ruby on Rails Cheatsheet

Architecture

Create a new application

Install the Rails gem if you haven't done so before

mlanett

HTTP status code symbols for Rails

Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

Status Code Symbol
1xx Informational
100 :continue
101 :switching_protocols
102 :processing

ngsmrk

stats = Sidekiq::Stats.new

stats.queues

stats.enqueued

stats.processed

stats.failed

zillou

Navigating Ruby Files with Vim - The Cheat Sheet

Precision motions for Ruby

Look up Ruby motions by running :help ruby-motion.

command	effect

alexpchin

Rails Generating & Scaffolding

Rails' use of strict naming conventions means a lot of core code SHOULD be in the same format whoever writes it? It could be written by a friend, colleague or a computer... it shouldn't matter because the same Rails rules apply to everyone.

This means that Rails can actually do some tasks for you! It can actually build things and write code on your behalf...

Coming from another language like PHP, this can seem like magic.