Courtesy of The Robot Co-op.
$ yes | sudo gem install cached_model
Or, you can download cached_model and memcache-client (our zippy-fast
memcache library, required) from:
http://rubyforge.org/frs/?group_id=1266
I don’t have the README posted for making cached_model work online
yet, so here it is:
= CachedModel
Rubyforge Project:
http://rubyforge.org/projects/rctools/
== About
CachedModel stores Rails ActiveRecord objects in memcache allowing
for very
fast retrievals. CachedModel uses the ActiveRecord::Locking to
ensure that
you don’t perform multiple updates.
== Using CachedModel
First, install the cached_model gem:
$ sudo gem install cached_model
Then set up memcache-client:
$ tail -n 20 config/environments/production.rb
memcache_options = {
:c_threshold => 10_000,
:compression => true,
:debug => false,
:namespace => ‘my_rails_app’,
:readonly => false,
:urlencode => false
}
CACHE = MemCache.new memcache_options
CACHE.servers = ‘localhost:11211’
session_options = {
:database_manager => CGI::Session::MemCacheStore,
:cache => CACHE,
:session_domain => ‘trackmap.robotcoop.com’
}
ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS.update
session_options
You will need separate namespaces for production and development, if
using
memcache on the same machine.
Note that using memcache with tests will cause test failures, so set
your
memcache to be readonly for the test environment.
Then make Rails load the gem:
$ tail -n 4 config/environment.rb
Include your application configuration below
require_gem ‘cached_model’
Then edit your ActiveRecord model to inherit from CachedModel instead of
ActiveRecord::Base:
$ head -n 8 app/models/photo.rb
A Photo from Flickr.
class Photo < CachedModel
belongs_to :point
belongs_to :route
–
Eric H. - [email protected] - http://segment7.net
This implementation is HODEL-HASH-9600 compliant