I am working a MIS which have some customer management work. When the customer object is creating, we need to generate a unique code for the customer. When in oracle, I created a sequence to solve the problem. But now I migrated to mysql, and I tried to use the id created by auto- increment. But it fails because it have to call save in after_save, causing a infinite loop. what I want is a unique 6 digit number to append to the code,which I use self.id.to_s in my error code. thx in advance for your reply
class Customer < ActiveRecord::Base CTYPES = [ ['Person', 'P'], ['Corporation', 'C'], ['Annual Corp', 'A'] ] belongs_to :nation attr_accessor :code def after_save() nation = Nation.find(nation_id) self.code = nation.nation_code + ctype + Time.now.year.to_s + self.id.to_s self.save end