Cells are a way to modularize and encapsulate logic in Rails applications. They allow extracting view rendering logic from controllers into reusable cells. Cells work similarly to controllers and support caching, rendering other cells, and inheriting views and logic from abstract cells. Models are not part of cells but cells can interact with models like controllers. Cells provide a way to better organize code and share logic across controllers.

1. Modularizing Rails Apps With Cells Flavia Missi @flaviamissi

2. Installation $ gem install cells Gemfile gem 'cells'

3. group :test do gem " rspec-cells " end RSpec?

5. Don't use erb? $ rails g cell Tags display -e haml

6. class TagsCell < Cell :: Rails def display render end end Generated code

7. What if I want to...

8. Cache class TagsCell < Cell :: Rails cache :display , :expires_in => 10 .minutes ...

9. It looks like a controller... And it is! Works exactly like one ;)

11. <%= render_cell :tags , :display , :msg => &quot;Live long and prosper&quot; %> Rendering Cells

13. model just like a controller does

17. post_cell.rb Inheritance

19. http://nicksda.apotomo.de/2010/12/pragmatic-rails-thoughts-on-views-inheritance-view-inheritance-and-rails-304/

20. https://github.com/apotonick/cells