thank! I copy the after_update() doc as following: ####### after_update() Is called after Base.save on existing objects that have a record. Note that this callback is still wrapped in the transaction around save. For example, if you invoke an external indexer at this point it won’t see the changes in the database. ######## I don't understand "Note that this callback is still wrapped in the transaction around save". if exception occurs when saving the existing record, or when executing after_update method body,both the existing record's saving and sql statements in the after_update method body are all rollbacked?
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