class Party(models.Model):
    par_id = models.TextField()
    par_people = models.ManyToManyField(People)

class People(models.Model):
    peo_id = models.TextField()
    peo_name = models.TextField()
    peo_type = models.TextField()

class Food(models.Model):
    foo_id = models.TextField()
    foo_party = models.ForeignKey(Party, on_delete=models.CASCADE)

class PartySerializer(serializers.ModelSerializer):
    class Meta:
        model = Party
        fields = ('par_id', 'par_people')
# People, Food has same structure...

class PartyList(generics.ListAPIView):
    queryset = Party.objects.all()
    serializer_class = PartySerializer
# People, Food has same structure...

#redundancy reduced...(e.g. import)
urlpatterns = [
    path('party/<int:par_id>/<int:peo_id>', views.PartyList.as_view()),
    path('party/<int:par_id>/<int:foo_id>', views.PartyList.as_view()),
]