1. MVC Gems
Kirill Shatrov, Evrone.com
Feb 2012, Helsinki

2. Kirill Shatrov
shatrov@me.com / @kiiir

3. resque web interface
tolk Spree
Devise
rails_admin
active_admin

4. Inboxes
• DRY each time
• Private and group messaging ability for Rails 3 app
• Pub/sub engine (live chat!)
• Read/unread flags
http://github.com/evrone/inboxes

5. Polemic
• DRY each time again :)
• Comments for any AR object
• Pub/sub (realtime comments, coming
soon)
http://github.com/evrone/polemic

6. Requirements
• Rails >= 3.1 (Asset Pipeline)
• Devise
• CanCan
• Faye for pub/sub (optional)

7. ::Rails::Engine
• its own models, controllers, views
• its own middleware stack (3.1+)
• routes (3.1+)
• locales
• config/environment.rb (3.1+)
• application config

8. What’s inside?

9. What’s inside?
MVC + helpers + routes

10. What’s inside?

11. Problems?
• Tests over dummy app
• Hard to test features that interact with Rails
• Hard to be flexible
• Troubles with controllers from Rails Engine

12. Engine controllers?

13. Engine controllers?

14. Tools
• Bundler
• bundle gem foo & rake release (no Jeweler!)

15. Travis CI
+
=

16. Hints
• Look inside source of other similar gems
• Be friendly with tests, at least models
• Review Readme after each release and write
wikis/tutorials

17. Open source
will save the world

18. Thank you!