Aleksandar Popovic alekpopovic

Run rails new --help to view all of the options you can use to generate new Rails application:

Output for Rails 7+

Usage:
  rails new APP_PATH [options]

Options:
      [--skip-namespace], [--no-skip-namespace]              # Skip namespace (affects only isolated engines)

Ruby Metaprogramming techniques

Use the singleton-class

Many ways of manipulating single objects are based on manipulations on the singleton class and having this available will make metaprogramming easier. The classic way to get at the singleton class is to execute something like this:

  sclass = (class << self; self; end)

SETUP VPS

based on DigitalOcean guide

Create local project

local$ rails new appname -T -d postgresql
local$ rails g scaffold Story title:string body:text
local$ rails db:migrate

Overview

Internet connection and DNS routing are broken from WSL2 instances, when some VPNs are active. The workaround breaks down into two problems:

Network connection to internet
DNS in WSL2

This problem is tracked in multiple microsoft/WSL issues including, but not limited to:

microsoft/WSL#5068

	## Instructions
	https://collabnix.com/kubernetes-dashboard-on-docker-desktop-for-windows-2-0-0-3-in-2-minutes/

	## Dashboard URL
	http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/#!/overview?namespace=default

	# Source: https://stackoverflow.com/questions/8199231/how-to-setup-mass-dynamic-virtual-hosts-in-nginx

	server {
	listen 80 default_server;
	listen [::]:80 default_server;

	# Match any server name with the format [subdomain.[.subdomain...]].domain.tld.dev
	server_name ~^(?<subdomain>([\w-]+\.)*)?(?<domain>[\w-]+\.[\w-]+)\.dev$;

	# Map by default to (projects_root_path)/(domain.tld)/www;

	module MyApp
	class Application < Rails::Application
	if Rails.env == 'test'
	require 'diagnostic'
	config.middleware.use(MyApp::DiagnosticMiddleware)
	end
	end
	end

	/*!
	* jQuery JavaScript Library v1.7.2
	* http://jquery.com/
	*
	* Copyright 2011, John Resig
	* Dual licensed under the MIT or GPL Version 2 licenses.
	* http://jquery.org/license
	*
	* Includes Sizzle.js
	* http://sizzlejs.com/

	class ApplicationControler < AC::Base
	include FayeHelper

	# ... existing code

	before_filter {
	return if current_user.nil?
	if current_user.refresh_session_token
	# make a new client with the new token
	client = setup_faye_client

	require 'sequel'
	DB = Sequel.connect('postgres://user:pass@localhost/db')
	DB.listen(:my_channel, loop: true) {\|channel, pid, payload\| puts "Got payload '#{payload}' on channel '#{channel}'" }