Rails tinyint(1) use boolean false http://blog.kazu69.net/2015/10/22/active-record-tinyint/

application.rb

# config/application.rb
require 'active_record/connection_adapters/mysql2_adapter'
ActiveRecord::ConnectionAdapters::Mysql2Adapter.emulate_booleans = false

example_model.rb

class StoreListing < ActiveRecord::Base
  attribute :price_in_cents, Type::Integer.new
end