Understanding after_update callback in Rails 4

Question

I have a Rails object with after_update callback that sends a record to a queue. And the problem is that I noticed sometimes the queue is being processed faster

Answer 1

after_save, after_create, after_update are called within the transaction block, so they will be executed before executing the SQL statement.

If you want to do something when the statement execution is completed, you should use after_commit callback.