Zeitwerk integration in Rails 6.0

My speak slide at The 88th RubyKansai.

1. Zeitwerk integration in Rails 6.0 The 88th RubyKansai
2. self.inspect { name: “@murajun1978”, nickname: “むらじゅん”, avatar: , job: “Web Developer”, interested: [“Ruby”,”Rails”,”React”,”TypeScript”,”GraphQL”,”Serverless”], communities: [“Shinosaka.rb”,”Rails Follow-up Osaka”,...], }
3. Agenda • Zeitwerk integration in Rails 6.0 • What is Zeitwerk? • Why use Zeitwerk? • How use Zeitwerk? • Conclusion
4. Zeitwerk integration in Rails 6.0
5. Zeitwerk is default (Rails >= v6.0) rails/railties/lib/rails/application/configuration.rb
6. You can use classic loader https://guides.rubyonrails.org/autoloading_and_reloading_constants.html#opting-out
7. But deprecation　 　　
8. Load code at startup with Zeitwerk rails/railties/lib/rails/application/finisher.rb
9. What is Zeitwerk?
10. Zeitwerk • Gem (https://github.com/fxn/zeitwerk) • Zeitwerk is an efficient and thread-safe code loader for Ruby • You can load modules with autoloading or eager loading • Without ‘require’ • You can also reload modules • Using Kernel.#autoload • Implicit namespaces • Explicit namespaces • Nested root directories
11. No dependencies!!! zeitwerk/zeitwerk.gemspec
12. Pure Ruby　　　
13. Why use Zeitwerk?
14. Zeitwerk (Pros) • Efficient and thread-safe • You can load modules with autoloading or eager loading • Without ‘require’ • You can also reload modules • Using Kernel.#autoload • Implicit namespaces • Explicit namespaces • Nested root directories • No dependencies
15. Zeitwerk (Cons) • ...
16. How use Zeitwerk?
17. Normally
18. That’s it　　
19. Implicit namespaces
20. Explicit namespaces
21. For Gem
22. Demo
23. Conclusion • Zeitwerk is Cool !!! • Zeitwerk integration in Rails 6.0 • You can build library without ‘require’ • You can use it easily
24. Enjoy Ruby with Zeitwerk　　
25. Thanks