Enumerated Attribute Accessor

Store enumerated attributes in your database as integers while using type checked symbols in code.

RubyDoc Documentation

Create integer columsn with _value suffix to store enumerated attribute values.

class CreateUsers < ActiveRecord::Migration
  def change
    create_table :users do |t|
      t.string :email, null: false
      t.string :password_digest
      t.integer :role_value, null: false, default: 0
      t.timestamps
    end
  end
end

Create a hash in your model to map symbols to enumerated attribute values.

class User < ActiveRecord::Base
  ROLE = {
    user:  0,
    admin: 1,
  }

  include AttrEnumAccessor
  attr_enum_accessor :role, with: ROLE
end

Access your enumerated values using symbols.

u = User.new
u.role = :admin
puts u.role_value

# throws exception
u.role = :unknown_role

puts User.where_role(:admin).count

Add this line to your application's Gemfile:

gem 'attr_enum_accessor'

And then execute:

$ bundle

1. Fork it
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 new Pull Request