DaanVanVugt

def generate_uuid(prefix, id)
  UUIDTools::UUID.sha1_create(UUIDTools::UUID_OID_NAMESPACE, "#{prefix}-#{id}")
end

class TransformToUuids < ActiveRecord::Migration
  def change
    models = [Contact, User, Version]

    models.each do |model|
      # Create new column for uuid