joeyponi

class AddPresentNameToComments < ActiveRecord::Migration[5.1]
  def self.up
    add_column :comments, :present_user_name, :string
    Comment.includes(:user).all.find_each{|c| c.present_user_name = c.user.name}
  end

  def self.down
    remove_column :comments, :present_user_name, :string
  end
end