Exnum

Exnum is enum extention for Rails. This gem extends enum about i18n, associated parameters, and array for select box.

Installation

Add this line to your application's Gemfile:

gem 'exnum'

And then execute:

$ bundle

Or install it yourself as:

$ gem install exnum

Usage

class User < ActiveRecord::Base
  # the value of the key "val" defines enum values
  # and the others defines associated parameters
  exnum role: {
    guest:   {val: 10, label: :red,   selectable: true, },
    general: {val: 20, label: :green, selectable: true,  permission: false},
    admin:   {val: 30, label: :blue,  selectable: false, permission: true},
  }
end

Assosiated parameter extention

User.role_labels
# => {"guest" => :red, "general" => :green, "admin" => :blue}
User.role_labels{|p| p[:selectable]}
# => {"guest" => :red, "general" => :green}
User.role_permissions
# => {"guest" => nil, "general" => false, "admin" => true}

user = User.new(role: :general)
user.role_label
# => :green
user.role_permission
# => false

I18n extention

ja:
  activerecord:
    enum:
      user:        # model name
        role:      # field name
          guest:   ゲスト
          general: 一般ユーザー
          admin:   管理者

User.roles_i18n
# => {"guest" => "ゲスト", "general" => "一般ユーザー", "admin" => "管理者"}
User.roles_i18n{|p| p[:selectable]}
# => {"guest" => "ゲスト", "general" => "一般ユーザー"}

user = User.new(role: :guest)
user.role_i18n
# => "ゲスト"

Array for select box extention

User.roles_for_select
# => [["ゲスト", "guest"], ["一般ユーザー", "general"], ["管理者", "admin"]]
User.roles_for_select{|p| p[:selectable]}
# => [["ゲスト", "guest"], ["一般ユーザー", "general"]]

You can use it like this:

<%= f.select :role, User.roles_for_select %>

enum

Of course, you can use methods provided by enum.

class User < ActiveRecord::Base
  exnum role: [:guest, :general, :admin]
end

class User < ActiveRecord::Base
  exnum role: {guest: 10, general: 20, admin: 30}
end

class User < ActiveRecord::Base
  exnum role: {guest: 10, general: 20, admin: 30}, _prefix: true
end

Contributing

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 a new Pull Request

License

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