LazyAttributes

lazy_attributes is an ActiveRecord plugin. lazy_attributes loads lazily specified attributes.

Build Status Gem Version

This gem is heavily inspired by lazy_columns.

Installation

Add this line to your application's Gemfile:

gem 'lazy_attributes'

And then execute:

$ bundle

Or install it yourself as:

$ gem install lazy_attributes

Usage

In Active Record model, specify attributes that are needed to be loaded lazyly with lazy_attributes:

class User < ActiveRecord::Base
  lazy_attributes :profile
  lazy_attributes :address, :bio
end

When model with lazyly-loaded attributes is associated with another model, you need specify scope for association with '.column_symbols_without_lazy'.

class Group < ActiveRecord::Base
  has_many :users, { select(User.column_symbols_without_lazy) }
end

For Rails 3.2, use select option.

class Group < ActiveRecord::Base
  has_many :users, select: User.column_symbols_without_lazy
end

TODO

  • Reload only attribute that is referenced
  • Clean up code and specs

Contributing

  1. Fork it ( https://github.com/[my-github-username]/lazy_attributes/fork )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request