Getting fragment-caching to work...

rubyonrails-talk
1

I'd having my first tries at caching in Rails, and would like to experiment with fragmentcaching. I have some problems with getting any results and i don't know exactly what's going on now.

I have this in my development.rb...

config.action_controller.perform_caching = true config.action_controller.cache_store = :file_store, RAILS_ROOT + "/public/cache/"

and this is my layout-viewfile...

- cache "main_menu" do   = render :partial => 'menu'

I see nothing happening though, and no files appear in public/cache, so i'm wondering if i overlooked something. The menu-partial loops through all categories (it has a Category.find(:all).each in it) but i still see that SQL-query in my terminal.

2

You messed up the cache_store setting a bit.

# /config/environments/development.rb config.action_controller.perform_caching = true config.action_controller.fragment_cache_store = [:file_store, "#{RAILS_ROOT}/tmp/cache"]

Then make sure to restart the server.

That really should work as long as the "find" action is contained directly within the partial and is not done in the controller.

3

hmmm, i'm getting a

undefined method `cache_fragment' for #<Haml::Template:0x2647a74>

when i do that. is haml in the way?

4

No, I am developing with HAML and I use fragment caching all the time. Are you using Rails 2.0.2. It should work like this:

# config/environments/development.rb config.action_controller.perform_caching = true config.action_controller.fragment_cache_store = [:file_store, "#{RAILS_ROOT}/tmp/cache"]

# app/views/example/something.html.haml

#... - cache(:controller => "example", :action => "something") do   <div id="some_section">     this section will be cached   </div> #...

That is how I have it all throughout my app and it seems to work.

5

Make sure you have the latest version of haml as well. Haml 1.8.2