How do you rollback during Django shell session after causing DatabaseError?

I used to know how to do this, but I forgot. Sometimes, while using the Django shell, you make a mistake and cause the transaction to become aborted. After that, any further queries you do will result in DatabaseError: current transaction is aborted, commands ignored until end of transaction block. However, I think there is a way to rollback the transaction when this happens manually so you don't have to restart your session. Can anyone tell me what it is?

This bug repor开发者_如何学编程t (https://code.djangoproject.com/ticket/10813) makes reference to the technique but doesn't explain it. Running django.db.transaction.rollback results in "TransactionManagementError: This code isn't under transaction management".

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This happens to me all the time when using Postgres, and it's really irritating.

You want:

from django.db import transaction
transaction.rollback()

Most of the time this is fine (and in my experience, it's safe to ignore the TransactionManagementError).

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This is slightly better because you get no stack trace about TransactionManagementError:

from django.db import transaction
transaction.rollback_unless_managed()