gistfile1.txt

## in a railtie initializer
      initializer 'data_mapper.configuration' do |app|
        app.config.data_mapper = Rails::DataMapper::Configuration.for(
          app.config.database_configuration
        )
        puts app.config.data_mapper.inspect
        puts app.config.data_mapper.class
      end

## running

ree-1.8.7-2010.01 mungo:datamapper_on_rails3 snusnu$ bundle exec vendor/bin/rails console
#<OrderedHash {}>
ActiveSupport::OrderedOptions