olegnikitashin

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

Output for Rails 7+

Usage:
  rails new APP_PATH [options]

Options:
      [--skip-namespace], [--no-skip-namespace]              # Skip namespace (affects only isolated engines)

olegnikitashin

How to update the Go version

System: Debian/Ubuntu/Fedora. Might work for others as well.

1. Uninstall the exisiting version

As mentioned here, to update a go version you will first need to uninstall the original version.

To uninstall, delete the /usr/local/go directory by:

olegnikitashin

Formatting XML in vi

Using xmllint

You can format XML in vi using xmllint

:%!xmllint "%" --format

Default indentation is 2 spaces. You can change that by assigning a value to the XMLLINT_INDENT environment variable. To do that without

olegnikitashin

require 'dry-validation'
require 'dry-struct'
require 'active_model/errors'

require_relative '../create_study'

module MyApp
  module Types
    include Dry::Types.module

olegnikitashin

/*
********************************************************************************
Golang - Asterisk and Ampersand Cheatsheet
********************************************************************************

Also available at: https://play.golang.org/p/lNpnS9j1ma

Allowed:
--------
p := Person{"Steve", 28} 	stores the value

olegnikitashin

module CapybaraHelpers
  class << self
    def local_ip
      ipv4_addr_info.ip_address
    end

    def setup_selenium_remote
      app_host ||= ENV.fetch('SELENIUM_APP_HOST', local_ip)
      Capybara.server_host = app_host
      Capybara.app_host = "http://#{app_host}:#{Capybara.current_session.server.port}"

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