Helo, I'm starting small app in rails and I found a problem. There are two databases: customer (id,name,surname) device(id,customer_id,mac) I'would like to insert new device with new customer data.. something like: http://localhost:3000/Customer should show me fields: New Customer Name ______________ Surname ____________ Mac _____________ Editing also should change values in both databases.. How acomplish that ? I try to add belongs_to :customer into device model but it fail ... -- Marcin Jurczuk, NIC-HDL: MJ1679-RIPE