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An ActiveRecord extension which allows attributes to be lazy loaded
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README.rdoc

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

  • Fork the project.

  • Make your feature addition or bug fix.

  • Add tests for it. This is important so I don't break it in a future version unintentionally.

  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

  • Send me a pull request. Bonus points for topic branches.

Copyright

Copyright © 2010 Moritz Heidkamp. See LICENSE for details.

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