Line 257 of django/db/models/fields/__init__.py explicitly deletes the validator_list and is_required parameters for BooleanFields. The frustrating part is that no errors are raised by providing a validator_list argument to a BooleanField, and I can't find any doumentation for this behavior. I understand and agree with not allowing is_required, but I have a use case for allowing validator_list. Is there any particular reason it's being deleted? (Other than that it often times simply doesn't have a value... the particular validator should deal with that by checking for a KeyError IMHO) Regardless though, silently deleting the attribute without an error or at least a warning is not very nice ;-)
