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require "resolv"

class Model < ActiveRecord::Base
  validates :ip_address, format: { with: Resolv::IPv4::Regex }
  validates :mac_address, format: { with: /\A([0-9A-F]{2}[-:]){5}([0-9A-F]{2})\z/ }
end

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# Implement a function called make_acronym that returns the first letters 
# of each word in a passed in string. Make sure the letters returned are 
# uppercase.

# If the value passed in is not a string return 'Not a string'
# If the value passed in is a string which contains only characters 
# other than spaces and alphabet letters, return 'Not letters'

def make_acronym(input_string)
  return nil unless input_string

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select
  *
from
  tables
join (
  select table_id
  from books
  where rating = 1
) as t1 on t1.table_id = tables.table_id
join (

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class PaymentsController < AuthenticatedController
  before_action { authorize!(roles: [:superuser], abilities: [:charge_user, :manage_payments]) }
end

class AuthenticatedController < ApplicationController
  def authorize!(roles: [], abilities: [])
    # current
    (roles & current_user.roles).any? || (abilities & current_user.abilities).any?
    
    # desired

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__mini_rails__

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begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
  raise e
end

gemfile(true) do
  source "https://rubygems.org"

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Integrate Gem/Engine and main Rails app

Overview

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

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# This is a skeleton for testing models including examples of validations, callbacks,
# scopes, instance & class methods, associations, and more.
# Pick and choose what you want, as all models don't NEED to be tested at this depth.
#
# I'm always eager to hear new tips & suggestions as I'm still new to testing,
# so if you have any, please share!
#
# @kyletcarlson
#
# This skeleton also assumes you're using the following gems: 

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# This is a skeleton for testing models including examples of validations, callbacks,
# scopes, instance & class methods, associations, and more.
# Pick and choose what you want, as all models don't NEED to be tested at this depth.
#
# I'm always eager to hear new tips & suggestions as I'm still new to testing,
# so if you have any, please share!
#
# @kyletcarlson
#
# This skeleton also assumes you're using the following gems: 

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Database migration best practices for Rails

Never ever change data on schema changes! [1]

Use rake tasks to change the data! [1]

This decouples a deployment from completed migrations. Give us control of the data manipulation proccess by encapsulatin it in on place. need to remember to:

1. Run it in one of the ways bellow: a. Add this rake task the deployment script or;