Expressing less-than and greater-than queries in active record with Ruby notation

lgbt.rb

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'sqlite3'
  gem 'activerecord', require: 'active_record'
end

# NOTE: uncomment to show logging
# ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Base.establish_connection({
                                          :adapter => 'sqlite3',
                                          :database =>":memory:",
                                        })

ActiveRecord::Schema.define do
  create_table :foobars, force: true do |t|
    t.integer :foo
  end
end

class Foobar < ActiveRecord::Base

end
puts Foobar.where(foo: ...100).to_sql
puts Foobar.where(foo: ..100).to_sql
puts Foobar.where.not(foo: ..100).to_sql
puts Foobar.where.not(foo: ...100).to_sql