tracks/db/migrate/030_set_nil_timestamps.rb

class SetNilTimestamps < ActiveRecord::Migration[5.2]

  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