acts_as_method_cacheable

Instead of writing def expensive { @cached_expensive ||= original_expensive }, now you can write instance.cache_method(:expensive) instead. Also support nested cache method for associations. This gem depend on ActiveSupport/ActiveRecord

Currernt Limitation

ONLY support method with no params

Installation

Add this line to your application's Gemfile:

gem 'acts_as_method_cacheable'

And then execute:

$ bundle

Or install it yourself as:

$ gem install acts_as_method_cacheable

Usage

cache method in class level, all instances will have the method cached

NOTE!! MUST put acts_as_method_cacheable in the last of the class file

class Post < ActiveRecord::Base
  def expensive_method
    # balababa
  end
  acts_as_method_cacheable :methods => :expensive_method
end

cache methods for a instance only

post = Post.find(xxx)
post.cache_method(:expensive_method)
post.cache_method([:expensive_method1, :expensive_method2])

cache methods for a instance and its associations

post = Post.find(xxx)
post.cache_method([:expensive_method3, :comments => :comment_expensive_method])

reload - will clear cache of all cached methods(both class/instance level)

post = Post.find(xxx)
post.cache_method(:expensive_method)
post.expensive_method  # expensive
post.expensive_method  # cheap!
post.reload
post.expensive_method  # expensive

reset cached method for a instance

post = Post.find(xxx)
post.cache_method(:expensive_method)
post.expensive_method  # expensive
post.expensive_method  # cheap!
post.reset_cache(:expensive_method)
post.expensive_method  # expensive

Contribute

You're highly welcome to improve this gem.

Checkout source code to local

say you git clone the source code to /tmp/acts_as_method_cacheable

Install dev bundle

cd /tmp/acts_as_method_cacheable
bundle install

Do some changes

vi lib/acts_as_method_cacheable.rb

Run test

bundle exec rspec spec