do.rb

require 'rubygems'

gem 'dm-core', '0.10.2'
gem 'do_sqlite3', '0.10.1.1'

require 'dm-core'

p DataMapper::VERSION

require 'do_sqlite3/version'

p DataObjects::Sqlite3::VERSION

DataMapper.setup(:default, "sqlite3:./test.sqlite3")

class T
  include DataMapper::Resource

  property :id, Serial

  property :flag, Boolean
end

T.auto_migrate!

T.create(:flag => true)

t = T.first
p t
t.flag = false
t.save

p T.all
t.flag = true
t.save

p T.all

terminal log

$ ruby do.rb
"0.10.2"
"0.10.1.1"
#<T @id=1 @flag=true>
[#<T @id=1 @flag=false>]
[#<T @id=1 @flag=true>]