PgEnum 
Add support for Postgres (enum)erated types to Active Record
Installation
Add this line to your application's Gemfile:
gem 'pg-enum'And then execute:
$ bundle
Or install it yourself as:
$ gem install pg-enum
Usage
Create an enum type like:
# db/migrate/20170818114925_add_status_to_conversations.rb
class AddStatusToConversations < ActiveRecord::Migration[5.1]
include PgEnum::MigrationHelpers
def up
create_enum :conversation_status, [:active, :archived]
add_column :conversations, :status, :conversation_status, default: "created"
end
def down
remove_column :conversations, :status
drop_enum :conversation_status
end
endTo add PgEnum to an Active Record model, simply include the PgEnum module.
class Conversation < ActiveRecord::Base
include PgEnum
pg_enum :status
endThe API is the same as ActiveRecord::Enum.
Conversation.statuses
# => { active: 'active', archived: 'archived' }
conversation = Conversation.create
conversation.status # => "created"
conversation.created? # => true
conversation.archived!
conversation.status # => "archived"
conversation.archived? # => true
Conversation.active.count # => 0
Conversation.archived.count # => 1License
The gem is available as open source under the terms of the MIT License.