olegnikitashin

# app/models/user.rb
class User < ActiveRecord::Base
  validates :zip_code, presence: true, zip_code: true
end

olegnikitashin

http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

#payload: [{"kind"=>"person"}]
Segment.where("payload @> ?", [{kind: "person"}].to_json)

#data: {"interest"=>["music", "movies", "programming"]}
Segment.where("data @> ?",  {"interest": ["music", "movies", "programming"]}.to_json)
Segment.where("data #>> '{interest, 1}' = 'movies' ")
Segment.where("jsonb_array_length(data->'interest') > 1")

olegnikitashin

private_key = "..."
client_email = "..."
bucket = "..."
path = "..."

full_path = "/#{bucket}/#{path}"
expiration = 5.minutes.from_now.to_i

signature_string = [
  "GET",

olegnikitashin

Integrate Gem/Engine and main Rails app

Overview

• Paths
• Routes
• Add functionality to controller
• Improving (Extending or overriding) Engine functionality
• Helpers
• Assets

olegnikitashin

Rails Singleton Model

Taken from:
http://stackoverflow.com/questions/399447/how-to-implement-a-singleton-model/12463209#12463209

olegnikitashin

# Support for Rspec / Capybara subdomain integration testing
# Make sure this file is required by spec_helper.rb
#  
# Sample subdomain test: 
# it "should test subdomain" do
#   switch_to_subdomain("mysubdomain")
#   visit root_path
# end

DEFAULT_HOST = "lvh.me"

olegnikitashin

source :rubygems
gem "puma"
gem "sinatra"

olegnikitashin

  private
  # Before every request, we set the locale, from the specified or detected settings, or from the cookie
  def set_locale
    if language_change_necessary?
      I18n.locale = the_new_locale
      set_locale_cookie(I18n.locale)
    else
      use_locale_from_cookie
    end
  end

olegnikitashin

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

olegnikitashin

require 'benchmark/ips'

def concat_string a, b
  a + b
end

def interpolate_string a, b
  "#{a}#{b}"
end