setup Rails 3.1 Gemfile using data_mapper 1.2.0.rc1

Gemfile

source 'http://rubygems.org'

gem 'rails', '3.1.0'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails', "~> 3.1.0"
  gem 'coffee-rails', "~> 3.1.0"
  gem 'uglifier'
end

# at the moment, you should use data_mapper gems from git, or it will not work
gem "dm-aggregates"     , :git => "git://github.com/datamapper/dm-aggregates.git"
gem "dm-constraints"    , :git => "git://github.com/datamapper/dm-constraints.git"
gem "dm-migrations"     , :git => "git://github.com/datamapper/dm-migrations.git"
gem "dm-transactions"   , :git => "git://github.com/datamapper/dm-transactions.git"
gem "dm-serializer"     , :git => "git://github.com/datamapper/dm-serializer.git"
gem "dm-timestamps"     , :git => "git://github.com/datamapper/dm-timestamps.git"
gem "dm-validations"    , :git => "git://github.com/datamapper/dm-validations.git"
gem "dm-types"          , :git => "git://github.com/datamapper/dm-types.git"
gem "dm-do-adapter"     , :git => "git://github.com/datamapper/dm-do-adapter.git"
gem 'dm-mysql-adapter'  , :git => "git://github.com/datamapper/dm-mysql-adapter.git"
gem 'dm-core'           , :git => "git://github.com/datamapper/dm-core.git"
gem 'dm-active_model'   , :git => "git://github.com/datamapper/dm-active_model.git"
gem 'dm-rails'          , :git => "git://github.com/datamapper/dm-rails.git"

gem 'jquery-rails'


# Add your othere gems/dependencies below