docs/8_customizing_models.md
Want to add functionality to a Pay model? You can define a concern and simply include it in the model when Rails loads the code.
First, you'll need to create a concern with the functionality you'd like to add.
# app/models/concerns/charge_extensions.rb
module ChargeExtensions
extend ActiveSupport::Concern
included do
belongs_to :order
after_create :fulfill_order
end
def fulfill_order
order.fulfill!
end
end
Then you can tell Rails to include the concern whenever it loads the application.
# config/initializers/pay.rb
# Re-include the ChargeExtensions every time Rails reloads
Rails.application.config.to_prepare do
Pay::Charge.include ChargeExtensions
end
See Testing