花月(Kagetsu) 
kagetsu is a library for create or update method on ActiveRecord.
Requirement
- Rails 5.2 or upper
Usage
User.create!(name: 'kotoko', email: 'old@example.com')
user = User.create_or_update(key: { name: 'kotoko' }, update_attributes: { email: 'new@example.com' })
user.email #=> new@example.com
Available Methods
- ActiveRecord::Base#create_or_update
- ActiveRecord::Base#create_or_update!