Is it true that the "await transaction.start()" line is missing from the databases lower-level transaction API usage example?

[allyotov]

The database help suggests the following way to use the low-level transaction API:

transaction = await database.transaction()
try:
    ...
except:
    await transaction.rollback()
else:
    await transaction.commit()

But if I try to use this code as is, I guess, the created transaction is not started. So, maybe, we have to start it explicitly as follows?

transaction = await database.transaction()
await transaction.start()  # start transaction explicitly
try:
    ...
except:
    await transaction.rollback()
else:
    await transaction.commit()

Please confirm or deny my assumption.

[allyotov]

I think, my assumption is wrong, because if I run transaction.start() it doubles in connection's transaction stack, so when I will commit it, one instance of it will still be there in transaction stack, and that may cause further problems.

So the example in databases documentation is correct.

Thank you.