FactoryGirl.define do factory :group do sequence(:order) { |n| "Order #{n}" } end factory :invalid_topic, :class => "Topic" do sequence(:title){ |n| "Title #{n}"} author_name nil end factory :topic do sequence(:title){ |n| "Title #{n}"} sequence(:author_name){ |n| "Author #{n}"} end factory :widget do sequence(:w_id){ |n| n} end end