Miltiple field lookup mixin for Django Rest Framework

mixin.py

from django.shortcuts import get_object_or_404

class MultipleFieldLookupMixin:
    lookup_ignorecase = True

    def get_object(self):
        queryset = self.get_queryset()
        queryset = self.filter_queryset(queryset)
        filter = {
            "{}{}".format(
                field, "__iexact" if self.lookup_ignorecase else ""
            ): self.kwargs[field]
            for field in self.lookup_fields
            if self.kwargs.get(field)
        }

        obj = get_object_or_404(queryset, **filter)
        self.check_object_permissions(self.request, obj)
        return obj

from functools import reduce
from django.db.models import Q
from django.shortcuts import get_object_or_404

class MultipleFieldLookupMixin:
    lookup_fields = ("pk",)
    lookup_ignorecase = True

    def get_object(self):
        queryset = self.get_queryset()
        queryset = self.filter_queryset(queryset)
        filter = {
            "{}{}".format(
                field, "__iexact" if self.lookup_ignorecase else ""
            ): self.kwargs[self.lookup_field]
            for field in self.lookup_fields
        }

        obj = get_object_or_404(
            queryset, reduce(lambda x, y: Q(x) | Q(y), filter.items())
        )
        self.check_object_permissions(self.request, obj)
        return obj