Rokku is a small authorization library for Hanami projects.

gem install rokku -v 0.5.0



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Rokku (ロック - lock) offers authorization for Hanami web applications.

Authorization was setup as inspired by this blog post. It supports the generation of policy files for each controller where authorized roles are specified for each action.


Add this line to your application's Gemfile:

gem 'rokku'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rokku

Rokku is already setup to be included by your Hanami application:

::Hanami::Controller.configure do
  prepare do
    include Hanami::Rokku


rokku -n mightyPoster -p post

The above CLI command will generate a policy file for the application mightyPoster (not the project) and the controller post. The file will be generated as myProject/lib/mightyPoster/policies/PostPolicy.rb

Each application will have its own app/policies folders.

The command must be run in the project root folder.

Once the file is generated, the authorized roles variables in the initialize block for required actions need to be uncommented and supplied with specific roles.

Then we can check if a user is authorized:

authorized?(controller, role, action)


  • Add support for author/owner authorizations.
  • Add generators for adding authorization rules to existing policies.



Move from Tachiban


After checking out the repo, run bin/setup to install dependencies. Then, run rake test 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 Rokku project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.