range_oj_encoding.rb

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'activerecord'
  gem 'pg'
  gem 'benchmark-ips'
  gem 'oj'
end

require 'active_record'
require 'logger'

pg_opts = {adapter: "postgresql", username: 'postgres', password: 'postgres', database: "appt_time_range_bench"}
begin
  ActiveRecord::Base.establish_connection(pg_opts.except(:database))
  ActiveRecord::Base.connection.create_database(pg_opts[:database])
  puts "Database #{pg_opts[:database]} was created."
rescue => e
  puts e
  puts "Database #{pg_opts[:database]} already exists.\n"
end
ActiveRecord::Base.establish_connection(pg_opts)
ActiveRecord::Base.logger = Logger.new(STDOUT)

begin
  ActiveRecord::Schema.define do
    create_table :appts, force: true do |t|
      t.tstzrange :time_range
    end
  end
rescue PG::DuplicateTable, ActiveRecord::StatementInvalid
  nil
end

class Appt < ActiveRecord::Base
end

x = Appt.new(time_range: 1.hour.from_now..2.hours.from_now)
opts = { mode: :rails }

puts "time_range: #{x.time_range} (#{x.time_range.class})"

dump = Oj.dump(x, opts)
puts dump

loaded = Oj.load(dump, opts)
puts "loaded: #{loaded} (#{loaded['time_range'].class})"

y = Appt.new(loaded)
puts "time_range: #{x.time_range} (#{x.time_range.class})"