FactoryBotのcreate_listの実装を調査

FactoryBotのcreate_listの実装を確認する

v6.2.1

https://github.com/thoughtbot/factory_bot

define-list-strategy_methodでメタプロしてるぽい

https://github.com/thoughtbot/factory_bot/blob/v6.2.1/lib/factory_bot/strategy_syntax_method_registrar.rb#L32-L45

strategy

https://github.com/thoughtbot/factory_bot/blob/v6.2.1/lib/factory_bot/internal.rb#L82-L88

Strategy::Create

https://github.com/thoughtbot/factory_bot/blob/v6.2.1/lib/factory_bot/strategy/create.rb#L8-L15

EvaluationはObservableをmix-in

https://github.com/thoughtbot/factory_bot/blob/v6.2.1/lib/factory_bot/evaluation.rb#L4-L5

https://github.com/thoughtbot/factory_bot/blob/v6.2.1/lib/factory_bot/evaluation.rb#L22-L25

Observable

https://docs.ruby-lang.org/ja/latest/class/Observable.html

ここでadd_observerしてる

https://github.com/thoughtbot/factory_bot/blob/4a37cb64090d6354a719e8c5ef73653f5d242017/lib/factory_bot/factory.rb#L41

count_observersという登録されているobserverの数を調べられるメソッドがあるので、observerがなかったらbulkみたいなことができるかも？

この辺でcallbacksを生成してる

https://github.com/thoughtbot/factory_bot/blob/v6.2.1/lib/factory_bot/definition.rb#L150-L158