amos-kibet

## Method 1 (from Dockyard's [blog post](https://dockyard.com/blog/2024/06/06/a-better-solution-for-waiting-for-async-tasks-in-tests))

Create a helper module, with this function:

```Elixir
def flush_task_supervisor do
  pids = Task.Supervisor.children(MyApp.TaskSupervisor)

  for pid <- pids do
    ref = Process.monitor(pid)

amos-kibet

{
  "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"
  },

amos-kibet

#Test credit card numbers to use when developing with Stripe

4242424242424242 Visa

4012888888881881 Visa

4000056655665556 Visa (debit)

amos-kibet

# 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;

amos-kibet

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

amos-kibet

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

amos-kibet

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:

amos-kibet

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

amos-kibet

import mysql.connector
from mysql.connector import errorcode

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

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>