entrydns/db/seeds/development/domains.seeds.rb

after 'development:users' do
  
  entrydns_org = Domain.find_by_name(Settings.host_domains.first)
  User.all.each do |user|
    20.times do
      domain = FactoryGirl.build(:domain, :user => user)
      domain.setup(FactoryGirl.generate(:email))
      domain.save!
      domain.soa_record.update_serial!
    end

    20.times do
      FactoryGirl.create(:a, :user => user, :domain => entrydns_org)
    end
  end
  
end