Bubbling Up Nested-transaction Failures with ActiveRecord

Question

I have a method in a service object that composes operations that should be wrapped in a transaction. Some of these operations are also wrapped in transactions. For example:

Answer 1

Throwing a custom error is always a good option in case of nested transactions. Please find more detail on nested-transations-in-rails .

Answer 2

Another easier approach, you can raise an CustomError < StandardError. Unlike ActiveRecord::Rollback, Error will bubble up through parent transactions. You can handle it wherever required. All other inner transactions will be rolled back.

Try the below template.

ActiveRecord::Base.transacton do
    ActiveRecord::Base.transacton do
        raise StandardError.new
    end
end

Answer 3

Here's how you could get failures in your nested transactions to bubble up:

User.transaction do
  User.create(username: 'Kotori')
  raise ActiveRecord::Rollback unless User.transaction(requires_new: true) do
    User.create(username: 'Nemu')
    raise ActiveRecord::Rollback
  end
end

Basically, you have to raise an error in your top-level transaction for it to rollback too. To do that, you raise an error if the nested transaction returns a falsey value(nil) or a truthy value.

Hope that helps!