Add this line to your application's Gemfile:

gem "hanami-validations"

And then execute:

$ bundle

Or install it yourself as:

$ gem install hanami-validations

Installing hanami-validations enables support for params validation in hanami-controller’s Hanami::Action classes.

class Signup < Hanami::Action
  params do
    required(:first_name)
    required(:last_name)
    required(:email)
  end

  def handle(req, *)
    puts req.params.class            # => Signup::Params
    puts req.params.class.superclass # => Hanami::Action::Params

    puts req.params[:first_name]     # => "Luca"
    puts req.params[:admin]          # => nil
  end
end

See hanami-controller for more detail on params validation.

1. Fork it ( https://github.com/hanami/validations/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

• User documentation
• API documentation

See LICENSE file.