[Bug] pydantic validation exception when validating unknown query strings

[Panaetius]

Describe the bug
when validating query strings with @validate(query=MyModel), the code can fail with a key error before reaching actual pydantic validation if query parameters not on the model are supplied.

Specifically, https://github.com/sanic-org/sanic-ext/blob/main/sanic_ext/extras/validation/clean.py#L6 fails because data contains a key that isn't in hints, as the model doesn't have that key that was sent in data.

This will lead to a KeyError instead of a pydantic ValidationError, making it hard to deal with. In our case, we pretty format ValidationError before returning errors to the client, but KeyError will just be a generic 500 error. And we don't want to catch all KeyErrors, as there could be KeyErrors unrelated to validation as well.

Expected behavior
A pydantic ValidationError to be created (if the Model has extra = "forbid") or validation to pass (if the model has extra = "ignore")

Environment (please complete the following information):

• OS: Arch Linux
• Browser curl/requests
• Version 23.12.0

Additional context
We use schemathesis to test our API, which will create many negative test cases like passing random arguments, and it expects those to fail with a 4xx error, but the issue above causes 500 errors, failing schemathesis.

[Pirulax]

Duplicate of #247?
Also, related to validate: #257

[Panaetius]

ah yes you're right. I had searched for open issues and couldn't find one for some reason

I'll close this one