custom seeds

db.rake

namespace :db do  namespace :seed do
    Dir[Rails.root.join('db', 'seeds', '*.rb')].each do |filename|
      task_name = File.basename(filename, '.rb')
      desc "Seed #{task_name}, based on the file with the same name in `db/seeds/*.rb`"
      task task_name.to_sym => :environment do
        load(filename) if File.exist?(filename)
      end
    end
  end
end