Luca Guidi

cached_models provides to your models a transparent approach to use Rails internal cache mechanism.

Usually, when you decide to use cache for your ActiveRecord results, you have to manually implement complex expiring policies.
cached_models simplifies your code:

class Author < ActiveRecord::Base
  has_many :posts, :cached => true
end

class Post < ActiveRecord::Base
  belongs_to :author, :cached => true
end

A more complex example..

class Project < ActiveRecord::Base
  has_many :developers, :cached => true

  has_many :tickets, :cached => true
  has_many :recent_tickets, :limit => 5,
    :order => 'id DESC', :cached => true
end

class Developer < ActiveRecord::Base
  belongs_to :project, :cached => true
end

Example 1

project.developers # Database fetch and automatic cache storing

developer = project.developers.last
developer.update_attributes :first_name => 'Luca' # Database update and cache expiration for project cache

Example 2

# Fetch associated collection for both the projects
project.developers
project2.developers

developer = project.developers.last
project2.developers << developer # Database update and cache renewal for both project and project2 caches

Example 3

project.tickets # Database fetch and automatic cache storing
ticket = project.recent_tickets.first
ticket.update_attributes :state => 'solved' # Database update and cache expiration for both tickets and recent_tickets entries

The current version works only with the has_many macro.

How to install

$ ./script/plugin install git://github.com/jodosha/cached_models.git

Official page

http://lucaguidi.com/pages/cached_models