almokhtarbr

This is the companion to my YouTube video: https://youtu.be/MJSZ3WcgHeE

Debugging Rails in Development

1. Basic

https://guides.rubyonrails.org/debugging_rails_applications.html

• Putting debug info into views using debug helper (or to_yaml or inspect)

almokhtarbr

Unknown username "whoopsie" in message bus configuration file (Crouton)
For some time I had this notification "Unknown username 'whoopsie' in message bus configuration file" coming up when I started my Ubuntu-server on my Chromebook via crouton. It seemed not to do anything wrong but hey, I hate to see error messages popping up on the screen and not knowing what it really means.

In my search I've learned that the user 'whoopsie'  is being used for the error reporting daemon in Ubuntu.

System Description:
Toshiba Chromebook 2:
Intel® Celeron® Processor N2840
Intel® HD Graphics
4GB DDR3 1600MHz 

almokhtarbr

class Game
  attr_gtk

  def tick
    defaults
    input
    calc
    render
  end

almokhtarbr

1. Change your database RDS instance security group to allow your machine to access it.
   • Add your ip to the security group to acces the instance via Postgres.
2. Make a copy of the database using pg_dump
   • $ pg_dump -h <public dns> -U <my username> -f <name of dump file .sql> <name of my database>
   • you will be asked for postgressql password.
   • a dump file(.sql) will be created
3. Restore that dump file to your local database.
   • but you might need to drop the database and create it first
   • $ psql -U <postgresql username> -d <database name> -f <dump file that you want to restore>

• the database is restored

almokhtarbr

Add ComparisonValidator

Before Rails 7

class Event < ApplicationRecord
  validates :start_date, presence: true
  validates :end_date, presence: true

  validate :end_date_is_after_start_date

almokhtarbr

# docker-compose.yml
version: '3'

services:
  web:
    build: ./
    command: 'rails server -b 0.0.0.0 -p 3000'
    ports:
      - 4000:3000

almokhtarbr

Rails Authentication from Scratch - Step by Step

Prerequisites

• Clone the Cloud9 thibaudgg/rails-weblog workspace. Go to https://c9.io/new/clone and then choose the "MAS-RAD / Ruby on Rails" team, click on the "Clone workspace" tab, then choose the "thibaudgg/rails-weblog" workspace.
• Seed the database, this will create some posts and comments (see db/seeds.rb):

rails db:seed

almokhtarbr

require 'rails_helper'

RSpec.describe TodosController, :type => :controller do

  describe "GET #index" do
  #describe "POST #create" do
  #describe "GET #show" do
  #describe "PATCH #update" do (or PUT #update)
  #describe "DELETE #destroy" do
  #describe "GET #new" do

almokhtarbr

# This is a skeleton for testing models including examples of validations, callbacks,
# scopes, instance & class methods, associations, and more.
# Pick and choose what you want, as all models don't NEED to be tested at this depth.
#
# I'm always eager to hear new tips & suggestions as I'm still new to testing,
# so if you have any, please share!
#
# @kyletcarlson
#
# This skeleton also assumes you're using the following gems: 

almokhtarbr

// index.html

<div id="chat">
    <ul id="message">
        <li v-for="message in messages" :key="message.id">{{ message }}</li>
    </ul>
    <form @submit="send">
        <input type="text" v-model="message">
        <button>Send</button>
    </form>