activerecord-lazy-attributes

This ActiveRecord extension allows to define attributes to be lazy-loaded. It’s main purpose is to avoid loading large columns (such as BLOBs) with every SELECT.

Installation

gem install activerecord-lazy-attributes

Loading

To use it in a Rails application, add this line to your environment.rb (or similar):

config.gem 'activerecord-lazy-attributes', :lib => 'lazy_attributes'

Otherwise:

gem 'activerecord-lazy-attributes'
require 'lazy_attributes'

Example

class Image < ActiveRecord::Base
  attr_lazy :data
end

i = Image.first # this selects all columns except "data"
i.data # "data" column is selected separately

Credit

This is based on this refactoring request (the code here is the last contribution to this refactoring).

Note on Patches/Pull Requests