What is purpose of around_create callback in Rails Model?

Question

when is around_create callback code executed, in what situations we should use it?

Answer 1

Besides Tom Harrison Jr's answer about logging and monitoring, I'm finding that the key differentiator is to gain control over whether or not the operation runs at all. Otherwise, you can implement your own before_* and after_* callbacks to do the same thing.

Take around_update, for example. Let's say you have a case where you don't want the update to run. For example, I'm building a gem that saves drafts in another drafts table but doesn't save certain updates to the "master" table.

around_update :save_update_for_draft

private

def save_update_for_draft
  yield if update_base_record?
end

The details of the update_base_record? method referenced here don't really matter. You can see that the update operation simply won't run if that method doesn't evaluate to true.