Juanse Caro juansecaro

Rails 7 new features. Before and After

Add ComparisonValidator
PostgreSQL generated columns
PostgreSQL custom enum types
Add tracking of belongs_to association
association_previously_changed? method
Add invert_where method
Add associated method
Add missing method
Active Record Encryption

How to make a contact form in rails 6

This is a quick walk through on how to:

make a contact form in rails 6,
test it locally, and
move it into production using heroku and the MailGun addon

This uses the free heroku and mailgun plans. If you get stuck on any part, check the full code here.

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

pg_dump is a nifty utility designed to output a series of SQL statements that describes the schema and data of your database. You can control what goes into your backup by using additional flags.
Backup: pg_dump -h localhost -p 5432 -U postgres -d mydb > backup.sql

Restore: psql -h localhost -p 5432 -U postgres -d mydb < backup.sql

-h is for host.
-p is for port.
-U is for username.
-d is for database.

Rails 5 and 6 Deployment with Ubuntu, Mina, Puma and Nginx

Based on this tutorial but simplified and inlined. Particularly removed any Rails and 3rd party services part, assumed you just need deployment to any Ubuntu machine.

Prerequisite

A functional Rails app
Hosted Git repository (Github, Bitbucket, Gitlab)
Cloud hosting account (Digital Ocean, Vultr, Linode, Lightsail)
Local SSH account

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Note: I'm currently taking a break from this course to focus on my studies so I can finally graduate

	FROM ruby:3.0-alpine

	RUN apk add --no-cache --update \
	ack \
	bash \
	build-base \
	curl \
	git \
	htop \
	less \

	==========================
	How Software Companies Die
	==========================
	- Orson Scott Card

	The environment that nurtures creative programmers kills management and
	marketing types - and vice versa.

	Programming is the Great Game. It consumes you, body and soul. When
	you're caught up in it, nothing else matters. When you emerge into

	#!/bin/bash
	#####################################################
	# Name: Bash CheatSheet for Mac OSX
	#
	# A little overlook of the Bash basics
	#
	# Usage:
	#
	# Author: J. Le Coupanec
	# Date: 2014/11/04