Run multiple command lines in ruby
create a file somefile.rake in your lib/tasks directory:
namespace :migrate do desc "create some SharedAccess" task shared_access: :environment do SharedAccess.create(room_id: 56, user_id: 3) SharedAccess.create(room_id: 56, user_id: 4) SharedAccess.create(room_id: 56, user_id: 5) endendand now you can rundocker exec containername bundle exec rake migrate:shared_access