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> user.name = "John"
> user.save
> user.name_previously_changed?
=> true

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> user.name = "John"
> user.save
> user.previous_changes
=> {"name"=>["Frank", "John"]}

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> user = User.first
> user.name
=> "Frank"
> user.name = "John"
> user.name_changed?
=> true
> user.name_change
=> ["Frank", "John"]

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module PreviouslyDirty
  extend ActiveSupport::Concern

  included do
    attribute_method_suffix '_previously_changed?'
  end

  private

  # Handle <tt>*_previously_changed?</tt> for +method_missing+.

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development:
  adapter: mysql2
  encoding: utf8
  database: my_db
  pool: 20
  username:
  password:

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namespace :data do
  MyApp::RakeData.tables.each do |table|
    desc "scrubs #{table} table data"
    task "scrub_#{table}" do

      string_attributes = table.classify.constantize.columns.map {|c| c.name if [:string, :text].include?(c.type) }.compact

      setters = []
      update_string = "UPDATE #{table} SET "
      string_attributes.each do |attribute|

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module MyApp
  module RakeData
    extend Self

    HILARIOUS_STRING = 'Gangster lorem ipsum from http://lorizzle.nl/'

    def tables
      ["list", "of", "table", "names"]
    end

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namespace :data do
  desc "scrubs all strings in every table"
  task :scrub => :environment do

    unless Rails.env.development?
      raise "This should only ever be run in development!"
    end

    tables = ActiveRecord::Base.connection.tables - ["schema_migrations"]

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Rabl.render(Event.first, 'events/event')

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