Amos Kibet amos-kibet

Ecto Changesets Crash Course

In order to insert, update or delete data from the database, Ecto.Repo.insert/2, update/2 and delete/2 require a changeset as their first parameter
Changesets validate data before being inserted to the database by checking for potential errors, asserting that required fields are passed, asserting that non-empty fields have data, keeping track of changes in the data (think of it as a version control for database transactions), etc

Empty Changeset

iex> %Ecto.Changeset{}
%Ecto.Changeset<action: nil, changes: %{}, errors: [], data: nil, valid?: false>

People

`:bowtie:`	😄 `:smile:`	😆 `:laughing:`
😊 `:blush:`	😃 `:smiley:`	☺️ `:relaxed:`
😏 `:smirk:`	😍 `:heart_eyes:`	😘 `:kissing_heart:`
😚 `:kissing_closed_eyes:`	😳 `:flushed:`	😌 `:relieved:`
😆 `:satisfied:`	😁 `:grin:`	😉 `:wink:`
😜 `:stuck_out_tongue_winking_eye:`	😝 `:stuck_out_tongue_closed_eyes:`	😀 `:grinning:`
😗 `:kissing:`	😙 `:kissing_smiling_eyes:`	😛 `:stuck_out_tongue:`

Linux Server Setup & MERN App Deployment

These are the steps to setup an Ubuntu server from scratch and deploy a MERN app with the PM2 process manager and Nginx. We are using Linode, but you could just as well use a different cloud provider or your own machine or VM.

Create an account at Linode

Click on Create Linode

Choose your server options (OS, region, etc)

SSH Keys

How to setup next.js app on nginx with letsencrypt

next.js, nginx, reverse-proxy, ssl

1. Install nginx and letsencrypt

$ sudo apt-get update
$ sudo apt-get install nginx letsencrypt

Also enable nginx in ufw

#Test credit card numbers to use when developing with Stripe

4242424242424242 Visa

4012888888881881 Visa

4000056655665556 Visa (debit)

	-- A game with two players. Player 1 thinks of a secret word
	-- and uses its hash, and the game validator script, to lock
	-- some funds (the prize) in a pay-to-script transaction output.
	-- Player 2 guesses the word by attempting to spend the transaction
	-- output. If the guess is correct, the validator script releases the funds.
	-- If it isn't, the funds stay locked.
	import Control.Monad (void)
	import Data.ByteString.Char8 qualified as C
	import Data.Map (Map)
	import Data.Map qualified as Map

	import mysql.connector
	from mysql.connector import errorcode

	config = {
	'user': 'root',
	'password': '',
	'host': 'localhost',
	'database': 'acme'
	}

	defmodule Randomizer do
	@moduledoc """
	Random string generator module.
	"""

	@doc """
	Generate random string based on the given legth. It is also possible to generate certain type of randomise string using the options below:

	* :all - generate alphanumeric random string
	* :alpha - generate nom-numeric random string

	# Serve nextJS app from a port through NGINX reverse proxy (HTTP)
	# Path: /etc/nginx/sites-available/default
	# Default server configuration for HTTP

	server {
	server_name www.DOMAINNAME.com DOMAINNAME.com;

	# Serve any static assets with NGINX
	location /_next/static {
	alias /home/ubuntu/PROJECT_FOLDER/.next/static;

	{
	"workbench.iconTheme": "vscode-icons",
	"editor.fontFamily": "Fira Code",
	"editor.fontLigatures": true,
	"workbench.colorCustomizations": {
	"editorWhitespace.foreground": "#fbff00",
	"workbench.colorTheme": "Monokai Vibrant",
	"workbench.activityBar.visible": true,
	"workbench.iconTheme": "vscode-icons"
	},