t1732/ar_cacheable

Cache of each ActiveRecord instance

ar_cacheable

Cache of each ActiveRecord instance

Installation

Add this line to your application's Gemfile:

gem 'ar_cacheable', :github => 't1732/ar_cacheable'

And then execute:

$ bundle

Usage

class Model < ActiveRecord::Base
  ar_cacheable
end

m = Model.find(params[:id])

# write cache
m.cache.write(:foo, "value", expires_in: 1.minute)
or
m.cache[:foo] = "value"

# read cache
m.cache.read(:foo)
or
m.cache[:foo]

# delete cache
m.cache.delete(:foo)

# check if there is a cache
m.cache.exist?(:foo)

# changes cache
m.name # => "name"
m.age  # => 20
m.update(:name => "update", :age => 30)
m.reload

m.last_changes # => { "name" => ["name", "update"], "age" => [20, 30] }

# caching only target column

  ar_cacheable :last_changes => :age

m.name # => "name"
m.age  # => 20
m.update(:name => "update", :age => 30)
m.reload

m.last_changes # => { "age" => [20, 30] }