Rails.application.config.to_prepare do Model # Zeitwerk autoload model # Reopen the Model class to add new functionality # This must match the name of your ActiveRecord class exactly. class Model # The 'after_save' macro is now run within the context of the existing Model class. after_save :execute_initializer_after_save # Define the new method to be executed on save. def execute_initializer_after_save # Your custom logic to execute after Model.save or Model.update! goes here. # 📝 Example Logic: puts "\n-------- JA --------- #{self.id}\n\n" end end end