Unstructure hook for NewType not invoked if NewType appears in a union #380
Description
- cattrs version: 23.1.2
- Python version: 3.11
- Operating System: macOS
Description
NewType unstructure hooks are not invoked if the new type appears in a union with other types.
What I Did
from typing import NewType
from attr import define
from cattr import Converter
Foo = NewType('Foo', str)
converter = Converter()
converter.register_unstructure_hook(Foo, lambda v: v.replace("foo", "bar"))
@define
class ModelWithFoo:
total_foo: Foo
maybe_foo: Foo | None
print(converter.unstructure(ModelWithFoo(Foo("foo"), Foo("is it a foo?"))))
# Produces: {'total_foo': 'bar', 'maybe_foo': 'is it a foo?'}