Expiring values with Ohm

expiring.rb

module Ohm
  module Expiring
    def self.included(base)
      base.send(:extend, ClassMethods)
    end

    module ClassMethods
      def expire(ttl)
        @@expire = ttl.to_i
      end

      def create(*args)
        object = super(*args)
        if !object.new? && @@expire
          Ohm.redis.expire(object.key, @@expire)
          Ohm.redis.expire("#{object.key}:_indices", @@expire)
        end
        object
      end
    end
  end
end

measurement.rb

require 'ohm/expiring'

class Measurement < Ohm::Model
  include Ohm::Expiring

  attribute :value
  expire 1.minute
end

rails_console_output.txt

jruby-1.6.3 :003 > Measurement.create(:value => 1)
 => #<Measurement:11 value=1>
 
jruby-1.6.3 :004 > Measurement[11]
 => #<Measurement:11 value="1">

#### wait a minute #### 

jruby-1.6.3 :005 > Measurement[11]
 => #<Measurement:11 value=nil> 

Very nice! Is there a way to make the entire model expire (instead of every value), i.e. return nil on the last Measurement[11] call in the console output example?

@abevoelker You can give the Ohm Expire gem a try https://github.com/joseairosa/ohm-expire