activerecord-postgres_enum icon indicating copy to clipboard operation
activerecord-postgres_enum copied to clipboard

Integrate PostgreSQL's enum data type into ActiveRecord's schema and migrations.

Gem Version Build Status


Adds migration and schema.rb support to PostgreSQL enum data types.

Sponsored by Evil Martians


Add this line to your application's Gemfile:

gem 'activerecord-postgres_enum'

And then execute:

$ bundle

Or install it yourself as:

$ gem install activerecord-postgres_enum



create_enum :mood, %w(happy great been_better)

create_table :person do
  t.enum :person_mood, enum_type: :mood

Running the above will create a table :person, with a column :person_mood of type :mood. This will also be saved on schema.rb so that rake db:schema:load works as expected.

To drop an existing enum:

drop_enum :mood

To rename an existing enum:

rename_enum :mood, :emotions

To add a value into existing enum:

add_enum_value :mood, "pensive"

To remove a value from existing enum:

:warning: Make sure that value is not used anywhere in the database.

remove_enum_value :mood, "pensive"

To add a new enum column to an existing table:

def change
  create_enum :product_type, %w[one-off subscription]

  add_column :products, :type, :product_type

To rename a value:

rename_enum_value :mood, "pensive", "wistful"

NB: To stop Postgres complaining about adding enum values inside a transaction, use disable_ddl_transaction! in your migration.


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


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


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

Code of Conduct

Everyone interacting in the Activerecord::PostgresEnum project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.