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tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

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Install PG Gem without installing Postgres locally

The Problem

Installing the ruby PG gem requires Postgres to be instaled locally to install the gem, which is annoying and unnecessary if you're building inside of docker.

An error occurred while installing pg (1.2.3), and Bundler cannot continue.
Make sure that `gem install pg -v '1.2.3' --source 'https://rubygems.org/'` succeeds before bundling.

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// $("a.popup").each(function() {
//    new PopupWindow($(this))
//  });

class PopupWindow {
  constructor($target){
    this.$target = $target

    if (this.$target.length === 0) {
      return

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options = {
  to: "[email protected]", 
  from: "[email protected]", 
  subject: "Testing", 
  body: "This is the body"
}
ActionMailer::Base.mail(options).deliver_now

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# Usage:
# class YourClass < ApplicationRecord
#   denormalizable_collection :my_collection
#   ...
#
#   def self.my_collection_data
#     self.where(...).limit(5)
#   end
# end

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Decorate class with extend/prepend

Update indexed instance after blob analyzed

# app/jobs/active_storage/analyze_job_decorator.rb
module ActiveStorage::AnalyzeJobDecorator
  def self.prepended(base)
    base.around_perform do |job, block|
      block.call

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# Oneliner
require 'sidekiq/api'; [Sidekiq::Queue.all.each(&:clear), Sidekiq::ScheduledSet.new.clear, Sidekiq::RetrySet.new.clear, Sidekiq::DeadSet.
new.clear];

require 'sidekiq/api'; 

# 1. Clear retry set
Sidekiq::RetrySet.new.clear

# 2. Clear scheduled jobs 

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du -h --max-depth 1

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#app/config/initializers/mailer.rb
ActionMailer::Base.smtp_settings = {
  address: 'smtp.mandrillapp.com',
  port: 587,
  user_name: '<account email>',
  password: '<api key>',
  authentication: 'login'
}

ActionMailer::Base.delivery_method = :smtp