Alexandr Kalinka Hunk13

Run rails new --help to see all of the options you can use to create a new Rails application:

Output for Rails 8+

Usage:
  rails COMMAND [options]

You must specify a command:

Kafka 0.11.0.0 (Confluent 3.3.0) added support to manipulate offsets for a consumer group via cli kafka-consumer-groups command.

List the topics to which the group is subscribed

kafka-consumer-groups --bootstrap-server <kafkahost:port> --group <group_id> --describe

Note the values under "CURRENT-OFFSET" and "LOG-END-OFFSET". "CURRENT-OFFSET" is the offset where this consumer group is currently at in each of the partitions.

Reset the consumer offset for a topic (preview)

Force Kubernetes to pull latest container image in a deployment

kubectl patch deployment DEPLOYMENT_NAME -p "{\"spec\":{\"template\":{\"metadata\":{\"labels\":{\"date\":\"`date +'%s'`\"}}}}}"

First, add pry-rails to your Gemfile:
https://github.com/rweng/pry-rails

gem 'pry-rails', group: :development

Then you'll want to rebuild your Docker container to install the gems

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

Sending emails with ActionMailer and Sidekiq

Send email asynchroniously using Sidekiq.

ActionMailer

Create your mailer us usual:

	class ConvertToActiveStorage < ActiveRecord::Migration[5.2]
	require 'open-uri'

	def change

	active_storage_blob_statement = ActiveRecord::Base.connection.raw_connection.prepare('active_storage_blob_statement', <<-SQL)
	INSERT INTO active_storage_blobs (
	"key", filename, content_type, metadata, byte_size, checksum, created_at
	) VALUES ($1, $2, $3, '{}', $4, $5, $6)
	SQL

	FROM ruby:2.5.1

	ENV LANG C.UTF-8

	RUN apt-get update -qq && \
	apt-get install -y --no-install-recommends \
	build-essential \
	libpq-dev \
	libfontconfig1 \
	less \

	# app/workers/active_admin_export_worker.rb
	class ActiveAdminExportWorker
	include Sidekiq::Worker
	sidekiq_options queue: 'high'

	def perform(options = {})
	model = options[:model_name].classify.constantize
	path = "#{Rails.root.to_s}/tmp/#{filename(options[:name])}"

	columns = model.send(:column_names)

	def fill_stripe_elements(card)
	using_wait_time(15) { within_frame('stripeField_card_element0') do
	card.to_s.chars.each do \|piece\|
	find_field('cardnumber').send_keys(piece)
	end

	find_field('exp-date').send_keys("0122")
	find_field('cvc').send_keys '123'
	find_field('postal').send_keys '19335'
	end }