Cop idea: flag callbacks for building associations

[pirj]

I see this frequently:

  factory(:status_message) do
    author

    after(:build) do |sm|
      FactoryBot.create(:poll, status_message: sm)
    end

This won't work with build_stubbed.

The can be written as (see Interconnected Associations):

  factory(:status_message, aliases: %i[status_message_without_participation]) do
    author

    poll { assoiation :poll, status_message: instance }
  end

instance was added in FactoryBot 6.1.0, @instance can be used in older versions.

This also works for has_many:

    factory :user_with_five_posts do
      posts do
        Array.new(5) { association(:post) }
      end
    end