ccyrille

class User < ActiveRecord::Base
...
  validates_presence_of :new_column,    
    # << REMOVE ON NEXT RELASE
    if: Proc.new { |o| o.has_attribute?(:new_column) } 
    # >> REMOVE ON NEXT RELEASE
...
end

ccyrille

class User < ActiveRecord::Base
...
  # << REMOVE ON NEXT RELASE  
  def self.columns
    super.reject { |c| c.name == "removed_column" }
  end
  # >> REMOVE ON NEXT RELEASE
...
end

ccyrille

class AddNewColumnToUsers < ActiveRecord::Migration
  def change
    add_column :users, :new_column, :text
  end
end

ccyrille

class MigrateFromOldColumnToNewColumn < ActiveRecord::Migration
  disable_ddl_transaction!
  def up
    User.find_in_batches do |mates|
      User.where(id: mates.map(&:id))
          .update_all("new_column=old_column")
    end
  end
  
  def down

ccyrille

class RemoveUsersOldColumn < ActiveRecord::Migration
  def change
    remove_column :users, :old_column
  end
end

ccyrille

class User < ActiveRecord::Base
...
  # << REMOVE ON NEXT RELASE
  def new_column
    if self.class.column_names.include?("old_column")
      self.class.reset_column_information
    end
    has_attribute?(:old_column) ? old_column : super
  end
  

ccyrille

# << REMOVE ON NEXT RELASE
unless NewModel.table_exists?
  # Fancy fallback goes here
  return
end
# >> REMOVE ON NEXT RELEASE

# Real implementation goes here

ccyrille

#!/usr/bin/env ruby
require 'io/console'
require 'octokit'
require 'netrc'

GITHUB_API_URL = "api.github.com"

def clear_github_netrc
  n = Netrc.read
  n.delete(GITHUB_API_URL)

ccyrille

require 'celluloid/current'
require 'celluloid/io'
require 'faraday'
require 'benchmark'

URL = 'https://api.wayzup.com'
PATH = '/v1/infos'
ADAPTER = Faraday.default_adapter
ITERATIONS = 20

ccyrille

require 'net/https'
require 'nokogiri'
require 'date'
require 'csv'

# PARAMETERS
GOOGLE_ACCOUNT_EMAIL = '<YOUR_GOOGLE_EMAIL>'
GOOGLE_ACCOUNT_PASSWORD = '<YOUR_GOOGLE_PASSWORD>'
SITE_URL = '<WEBSITE_URL>'
CSV_OUTPUT_FILE = "GoogleWebmaster-#{SITE_URL}-crawlErrors.csv"