datamapper gems

data_mapper (1.0.2)
data_objects (0.10.2)
datamapper (1.0.2)
dm-aggregates (1.0.2)
dm-constraints (1.0.2)
dm-core (1.0.2)
dm-do-adapter (1.0.2)
dm-migrations (1.0.2)
dm-serializer (1.0.2)
dm-sqlite-adapter (1.0.2)
dm-timestamps (1.0.2)
dm-transactions (1.0.2)
dm-types (1.0.2)
dm-validations (1.0.2)
do_sqlite3 (0.10.2)
extlib (0.9.15)

error

/usr/lib/ruby/gems/1.9.1/gems/data_objects-0.10.2/lib/data_objects/connection.rb:76:in `initialize': unable to open database file (DataObjects::ConnectionError)
	from /usr/lib/ruby/gems/1.9.1/gems/data_objects-0.10.2/lib/data_objects/connection.rb:76:in `new'
	from /usr/lib/ruby/gems/1.9.1/gems/data_objects-0.10.2/lib/data_objects/pooling.rb:177:in `block in new'
	from <internal:prelude>:10:in `synchronize'
	from /usr/lib/ruby/gems/1.9.1/gems/data_objects-0.10.2/lib/data_objects/pooling.rb:172:in `new'
	from /usr/lib/ruby/gems/1.9.1/gems/data_objects-0.10.2/lib/data_objects/pooling.rb:119:in `new'
	from /usr/lib/ruby/gems/1.9.1/gems/data_objects-0.10.2/lib/data_objects/connection.rb:65:in `new'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-do-adapter-1.0.2/lib/dm-do-adapter/adapter.rb:235:in `open_connection'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-do-adapter-1.0.2/lib/dm-do-adapter/adapter.rb:260:in `with_connection'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-do-adapter-1.0.2/lib/dm-do-adapter/adapter.rb:33:in `select'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/adapters/dm-sqlite-adapter.rb:77:in `sqlite_version'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/adapters/dm-sqlite-adapter.rb:38:in `supports_drop_table_if_exists?'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/adapters/dm-do-adapter.rb:101:in `destroy_model_storage'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/auto_migration.rb:87:in `destroy_model_storage'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/auto_migration.rb:160:in `auto_migrate_down!'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/auto_migration.rb:129:in `auto_migrate!'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/auto_migration.rb:45:in `block in repository_execute'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-core-1.0.2/lib/dm-core/support/descendant_set.rb:68:in `block in each'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-core-1.0.2/lib/dm-core/support/descendant_set.rb:67:in `each'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-core-1.0.2/lib/dm-core/support/descendant_set.rb:67:in `each'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/auto_migration.rb:44:in `repository_execute'
	from /usr/lib/ruby/gems/1.9.1/gems/dm-migrations-1.0.2/lib/dm-migrations/auto_migration.rb:22:in `auto_migrate!'
	from init.rb:17:in `<main>'

system

ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux]
gem --version => 1.3.7

test.rb

#!/usr/bin/env ruby

require 'dm-core'
require 'dm-migrations'

class Message
    include DataMapper::Resource
    
    property :id,       Serial
    property :sender,   String
    property :message,  String
end


DataMapper.setup(:default, 'sqlite:///#{Dir.pwd}/development.db')

DataMapper.auto_migrate!