class SetNilTimestamps < ActiveRecord::Migration class Project < ActiveRecord::Base; end class Context < ActiveRecord::Base; end def self.up Project.where(:created_at => nil ).each do |p| Project.update( p.id, {:created_at => Time.now.utc} ) end Project.where(:created_at => nil ).each do |p| Project.update( p.id, {:updated_at => Time.now.utc} ) end Context.where(:created_at => nil ).each do |p| Context.update( p.id, {:created_at => Time.now.utc} ) end Context.where(:created_at => nil ).each do |p| Context.update( p.id, {:updated_at => Time.now.utc} ) end end def self.down #nothing to do here... end end