A code example referenced in our blog post: https://medium.com/expected-behavior/our-plan-for-zero-downtime-database-transitions-with-rails-part-2-3cc4c5d6051c

ex05-error-cases-callback-method.rb

def write_active_migrator_destination_model
  begin
    write_active_migrator_destination_model!
  rescue Exception => e
    ActiveMigrator.config.exception_handler.call(e, active_migrator_source_class: active_migrator_source_klass.name, active_migrator_source_id: id)
  end
  true
end