I’m trying to create a filter for DRF viewset that will filter my model field:

    is_claim_submitted = models.BooleanField(
        IS_CLAIM_SUBMITTED_NAME, blank=True, null=True
    )

I’ve written a filter according to django-filter docs

class BoolInFilter(BaseInFilter, BooleanFilter):
    pass


class DefectFilter(django_filters.FilterSet):
    is_claim_submitted__in = BoolInFilter(
        field_name="is_claim_submitted",
        lookup_expr="in",
    )

    class Meta:
        model = Defect
        fields = {
            "id",
            "is_claim_submitted",
        }

So I’m trying to filter a queryset by sending request http://localhost:8000/api/v1/defects/is_claim_submitted__in=true,false. Basicly, the values of URI param must be in a list of [True, False, None]. How ever it doesn’t filter and it doesn’t parse the values to python bools (true -> True). For some reason it doesn’t get field_class = forms.NullBooleanField from BooleanFilter, but uses default Field parsing.

I’ve already checked the MRO, though I still can’t manage to figure out why my code doesn’t work.
The problem is precisely with BooleanFilter, as all the same but with NumberFilter and ids works fine.

Is there a mistake in my code or is there a better way to implement such a filter?