null() validator can be confusing with none=False

[salu133445]

Hi,

I found that the null() validator can be confusing with none=False. Here is an example.

# Data
key: ~

# Schema
null(required=False, none=False)  # -> this will pass without throwing errors

One possible way is to state it clear in the documentation that none=False will simply be ignored for a null() validator. The other way is to raise an error during constructing the validator if none=False is set for a null validator.

Thanks.

[mildebrandt]

I think documentation is fine here. People can actually add any random keyword argument to the validator...we only pick up the valid ones and use them. If there's a bigger effort to validate all the constraints in a validator in the future, we can add this as one of the work items. Thanks!

[mildebrandt]

Closing due to lack of comments.