Getting fragment-caching to work

Rails
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

hmmm, i’m getting a

undefined method `cache_fragment’ for #Haml::Template:0x2647a74

when i do that. is haml in the way?

On Mar 10, 1:00 am, Nathan E. <rails-mailing-l…@andreas-

3

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
    this section will be cached

#…

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

4

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.

5

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