Vladimir Karan Grahovac kejkz

Avoid allow_any_instance_of

Rails 5+
Rspec

I don't wanna be stuck with it again.

Ok, maybe this is trivial, but maybe that'll help someone:

Code example

Notice:

* This method is tested on Chrome Version 61.0.3163.100, chromedriver Version 2.33.506106

Getting the progress of the first downloads-item

So for some reason, chrome keeps download items in the shadow-root of tag .

This makes me so confused when I am trying to automate chrome to download files.

Using multiple GitHub deploy keys on a single server with a single user

Within GitHub it is possible to set up two types of SSH key - account level SSH keys and and repository level SSH keys. These repository level SSH keys are known in GitHub as deploy keys.

Deploy keys are useful for deploying code because they do not rely on an individual user account, which is susceptible to change, to “store” the server keys.

There is, however, an ‘issue’ with using deploy keys; each key across all repositories on GitHub must be unique. No one key can be used more than once. This becomes a problem when deploying to repositories to the same server with the same user. If you create two keys, the SSH client will not know which key to use when connecting to GitHub.

One solution is to use an SSH config file to define which key to use in which situation. This isn’t as easy as it seems.. you might try something like this:

Migrating a Rails project from MySQL to PostgreSQL

This brief guide is written from my own experience with migrating a large (~5GB) MySQL database to PostgreSQL for a Rails project.

No warranties, guarantees, support etc. Use at your own risk and, as always, ENSURE YOU MAKE BACKUPS FIRST!

I chose [pgloader][1] because it's extremely fast. YMMV.

Replace mysql2 gem with pg in Gemfile.
Update config/database.yml for PostgreSQL. I used [Rails' template][2] as a starting point.

	require 'countries/iso3166'

	class CreateCountries < ActiveRecord::Migration[6.0]
	def change
	create_table :countries do \|t\|
	t.string :name, limit: 64
	t.string :name_it, limit: 64
	t.integer :region, limit: 1
	t.string :iso2, limit: 2
	t.string :phone_prefix, limit: 3

	<%= form_with(model: billboard) do \|form\| %>
	<%= tag.div class: "dropzone", data: { controller: "dropzone", dropzone_param_name_value: "billboard[images][]", dropzone_url_value: rails_direct_uploads_url, dropzone_accepted_files_value: "image/*", dropzone_max_files_value: 3, dropzone_max_filesize_value: 0.300 } do %>
	<div class="dz-default dz-message flex flex-col items-center">
	<%= image_tag "upload.svg", size: 28, class: "colorize-black", aria: { hidden: true } %>
	<h5 class="font-semibold mbs-4">Drop files here or click to upload.</h5>
	<p class="text-sm text-subtle">Upload up to 10 files.</p>
	</div>
	<% end %>

	<div class="inline-flex items-center mbs-2 mie-1">

	namespace :db do
	DUMP_FMT = 'p' # 'c', 'p', 't', 'd'

	desc 'Dumps the database to backups'
	task sql_dump: :environment do
	dump_sfx = suffix_for_format(DUMP_FMT)
	backup_dir = backup_directory(true)
	cmd = nil
	with_config do \|app, host, db, user\|
	file_name = Time.now.strftime("%Y%m%d%H%M%S") + "_" + db + '.' + dump_sfx


	# Based on logfmt:
	# https://www.brandur.org/logfmt
	# For more complete implementation see:
	# see https://github.com/arachnid-cb/logfmtr/blob/master/lib/logfmtr/base.rb
	# For usage see:
	# https://blog.codeship.com/logfmt-a-log-format-thats-easy-to-read-and-write/
	# https://engineering.heroku.com/blogs/2014-09-05-hutils-explore-your-structured-data-logs/
	# For Ruby parser see:
	# https://github.com/cyberdelia/logfmt-ruby

	<!-- app/views/layouts/application.html.erb -->
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<!-- ... -->
	<% if Rails.application.config.disable_animations %>
	<%= stylesheet_link_tag('disable_animations') %>

	<!-- Turn off animations in jQuery -->
	<script>$.fx.off = true;</script>

	# When using a CI server, like Jenkins, in conjunction with github, you may wish to use
	# multiple deploy keys (github-speak for an rsa key pair that has been assigned to a single
	# repo, rather than a user) to allow Jenkins to pull code from the github repositories

	# In the example here, where three repos are used, the idea is to take advantage of ssh's config mechanism
	# For use with Jenkins, do the following:
	# login to your CI Server
	sudo su jenkins
	cd ~/.ssh/