Factory Girl Mongoid Associations

gistfile1.rb

# This doesn't actually update the user.thing.user_id field.
factory :user_with_a_thing, class User do
  association :thing, Factory :thing
end
# So later, a call to user.thing will return nil
# of if you inspect Thing.last, its user_id field will be nil


# This seems to persist it
factory :user_with_a_thing, class User do
  association :thing, Factory :thing
  
  after :create do |user|
    user.thing.save
  end
end