db/migrate/016_add_creation_ip.rb

   1 class AddCreationIp < ActiveRecord::Migration[4.2]
   2   def self.up
   3     add_column "users", "creation_ip", :string
   4   end
   5
   6   def self.down
   7     remove_column "users", "creation_ip"
   8   end
   9 end