I am looking for a way to use a long/bigint primary key instead of the default integer id. I did some googling and there are some results (e.g. http://stackoverflow.com/questions/1066340/how-to-use-long-id-in-rails-applications), but I am not sure about the solutions and I don''t want to have problems in a couple of months. Btw. I really want to use a standard mechanism and not a Rails hack, so that I can use the models without any special treatment. Appreciate any help, Thanks. Heli