BitwiseAttribute

Installation

Add this line to your application's Gemfile:

gem 'bitwise_attribute'

And then execute:

$ bundle

Or install it yourself as:

$ gem install bitwise_attribute

Usage

Include BitwiseAttribute and then define your attribute with attr_bitwise. By default it will use the singularized name with _mask.

For the roles attribute you need to have role_mask column in your model, so add the migration:

class AddRoleMaskToUsers < ActiveRecord::Migration
  def change
    add_column :users, :role_mask, :integer, default: 0
  end
end

class User < ActiveRecord::Base
  include BitwiseAttribute

  attr_bitwise :roles, values: i[user moderator admin]
end

You can then use

user = User.first
user.roles #=> []
user.roles = [:user, :admin] #=> [:user, :admin]
user.save
user.role_mask #=> 5

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/rikas/bitwise_attribute.

License

The gem is available as open source under the terms of the MIT License.