I'm a bit confused about how I should handle transactions in a particular situation.

I've got some code that boils down to this:

from django.db import transaction

@transaction.commit_on_success
def process_post():
    #do stuff with database
    for reply in post_replies:
        process_post_reply(reply)

@transaction.commit_on_success
def process_post_reply(reply):
    #do stuff with database

I want to know what happens if a process_post_reply() fails.

How does commit_on_success handle being nested? Will it understand to commit each process_post_reply() or if one fails the whole process_post() rolls back?

database django django-orm
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