Disallow

disallow gem is a utility for Ruby on Rails that allows you to restrict the usage of default scopes and callbacks in your ActiveRecord models.

Add this line to your application's Gemfile:

gem 'disallow'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install disallow

You can use this gem by just adding the methods to your model.

1. To disallow all callbacks in a model, use disallow_callbacks!:

class MyModel < ActiveRecord::Base
  disallow_callbacks!

  before_save :do_something
  #=> raise Disallow::CallbackError
end

2. To disallow specific callbacks, use disallow_XXX_callbacks!, where XXX is the name of the callback:

class MyModel < ActiveRecord::Base
  disallow_before_save_allbacks!
  disallow_after_create_callbacks!

  before_save :do_something
  #=> raise Disallow::CallbackError

  after_save :do_something
  #=> ok
end

To disallow default scope definitions, use disallow_default_scope!:

class MyModel < ActiveRecord::Base
  disallow_default_scope!
  default_scope { where(title: nil) }
  #=> raise Disallow::DefaultScopeError
end

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 rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/a5-stable/disallow. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

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

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