Tricking PaperTrail into saving attributes that didn't change - problem

hie-problem.rb

patient_preferences = create(
  :patient_preferences,
  health_information_exchange_opt_in: true,
  health_information_exchange_legal_text_version: 1
)

patient_preferences.health_information_exchange_opt_in = true
patient_preferences.health_information_exchange_legal_text_version = 2

puts patient_preferences.changes
#=> {"health_information_exchange_legal_text_version"=>[1, 2]}
# health_information_exchange_opt_in is missing

patient_preferences.save!

puts patient_preferences.versions.last.object_changes
#=> ---
#=> health_information_exchange_legal_text_version:
#=> - 1
#=> - 2
#=> updated_at:
#=> - 2019-08-30 17:57:12.000000000 Z
#=> - 2019-08-30 17:57:13.000000000 Z

# health_information_exchange_opt_in is missing, so we have to infer it from:

puts patient_preferences.versions.first.object_changes
#=> ---
#=> health_information_exchange_opt_in:
#=> - 
#=> - true
#=> health_information_exchange_legal_text_version:
#=> - 
#=> - 1