CachedModel
Rubyforge Project:
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