Pundit::Plus

Add some extra features to Pundit.

• Custom exceptions
• Manage required or permitted params from within your policy classes

Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add pundit-plus

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install pundit-plus

Usage

This includes Pundit and Pundit Matchers.

Follow the instructions for using Pundit and Pundit Matchers.

Include the Pundit::Plus module in your policy classes to add extra features to Pundit. For example:

class ApplicationPolicy
  include Pundit::Plus
  # this module defines the default exception_from behavior
end

class MyPolicy < ApplicationPolicy
  # Then you can use your own exception classes
  class CustomException < Pundit::NotAuthorizedError
    def initialize(options = {})
      options[:message] ||= "You are not authorized to perform this action."
      super(options)
    end
  end

  def exeception_from(query:)
    if query == :show?
      CustomException
    else
      super
    end
  end

  def initialize(user, record)
    @user = user
    @record = record
  end

  # Return the params for the action but require a special key
  def params_for_update(params)
    params_for(@record, params, :update).tap do |params|
      params.require(:special_key)
    end
  end

  def permitted_attributes
    %i[name other special_key]
  end
end

class SomeController < ApplicationController
  def update
    @some_record.update(params_for_action(@some_record))
  end
end

Development

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 the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/SOFware/pundit-plus.