Hi, I''m working on the Agile book and since the beginning of the book I''ve been wonder how either Rails maintains clean tables or if I have to build a method myself. For those following the Agile book this is about Iteration 9.1, the checkout page and customer details table. If you checkout as the same customer twice, all the data is entered as a new entry. What I want is to either insert new data or use existing data, especially if I am mixing those id''s in a join table later. Is anybody else doing the same thing who could give me some advice? Thank a lot, Todd