box-o-sand/rails/map-mash/lib/tasks/maps.rake

namespace :maps do
  desc 'Seed the maps!'
  task :seed => :environment do
    require 'app/models/map'

    csv_filename = File.expand_path(
      '../../db/capital-cities.csv', File.dirname(__FILE__)
    )
    Map.import(csv_filename) do |map|
      puts "Seeded map '#{map.name}'"
    end
  end
end