TypedChoiceFilter is **not** a superset of ChoiceFilter

[JacKeelvar-O-Connor]

Bug

The docs state that TypedChoiceFilter is the same as ChoiceFilter with an additional coerce argument https://django-filter.readthedocs.io/en/stable/ref/filters.html#typedchoicefilter. However, null_value and null_label are not acceptable arguments to TypedChoiceFilter.

Example snippet + error message

    myboolean = filters.TypedChoiceFilter(
        choices=(
            ("yes", "Yes"),
            ("no", "No"),
        ),
        coerce=lambda x: x == "yes",
        null_label="Unknown",
        null_value="null",
        field_name="myboolean",
    )

TypeError: Field.__init__() got an unexpected keyword argument 'null_label'

Relevant django-filters code

The following snippet implements the null lookup as best I can tell. It is implemented directly on the ChoiceFilter so is not shared with the TypedChoiceFilter (which does not inherit from ChoiceFilter).

django-filter/django_filters/filters.py

Lines 186 to 193 in 635343e

	def filter(self, qs, value):
	if value != self.null_value:
	return super().filter(qs, value)
	qs = self.get_method(qs)(
	**{"%s__%s" % (self.field_name, self.lookup_expr): None}
	)
	return qs.distinct() if self.distinct else qs

[JacKeelvar-O-Connor]

Unrelated but Google Gemini insisted upon telling me this should work for a good 30 minutes before I had the bright idea to just dig deeper into the source code.