UnexpectedForeignConnectionError as optional warning

[maybephilipp]

Hello everyone!

I was really happy to see UnexpectedForeignConnectionError in the new version, but now I see a production error in my code and I actually need to disable this only for few queries.

My scenario: I'm doing some stuff related to user, for ex., sign up, and then I notice that an user violated some rule, it this case I need to add a warning on his account, but rest of the transaction should rollback. So what I do now is that I use transaction for changing the user and pool for violation warnings inserts as they shouldn't be part of safe transaction - I want to know about these warning on user whatever happens.

But if I use dangerouslyAllowForeignConnections, then I have this convenient feature disabled for the whole project.
I would suggest implementing a warning (in case I have dangerouslyAllowForeignConnections we still see warnings) or an option on particular query so there is more granularity.