wpzero/declarative_policy

declarative policy, extract from gitlab

DeclarativePolicy

https://docs.gitlab.com/ee/development/policies.html

This gem is extracted from gitlab. Now it is beta version.

In my option, this gem is more flexible and includes performance improvement trick than cancancan or pundit.

Installation

Add this line to your application's Gemfile:

gem 'declarative_policy'

And then execute:

$ bundle

Or install it yourself as:

$ gem install declarative_policy

Usage

class ProjectPolicy < BasePolicy
  desc "User is the owner of the project"
  condition "owner" do
    subject.projectable == user
  end

  desc "User is a member of the project's group"
  condition "member" do
    user &&
      subject.projectable.is_a?(Group) &&
      subject.projectable.users.where(id: user.id).exist?
  end

  rule { owner }.policy do
    enable :destroy_project
    enable :edit_project
  end

  rule { global_always_true }.policy do
    enable :mix_delegate_action
  end
end

DeclarativePolicy.policy_for(user, project).can?(:destroy_project)

Development

After checking out the repo, run bin/setup to install dependencies. Then, run 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 rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/wpzero/declarative_policy. This project is intended to be a safe, welcoming space for collaboration.

License

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

Code of Conduct

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