Put and patch requests in tests don't change the object or serializer

Using Django
1

I am writing tests for django application, and I don’t understand why put and patch requests don’t change the actual models fields

setUp

def setUp(self) -> None:
        self.c = APIClient()
        user_kw = dict(username='just_user', password='password', email='user@gmail.com')
        user_kw['password'] = make_password(user_kw['password'])
        self.user = User.objects.create(**user_kw)
        self.superuser = User.objects.create_superuser(username='admin', email='admin@test.com', password='password')
        self.discount = Discount.objects.get(user=self.user)

The test functions

def test_put_superuser(self):
        self.c.force_login(self.superuser)
        response = self.c.put(f'/api/accounts/discount/{self.discount.id}',
                              {"user": self.user.id,
                               "pointcount": OrderedDict([("points", 0.0), ("id", self.user.id)]),
                               "discount": 0.9,
                               "prev_count": 100.0}
                              , format='json', follow = True)
        self.assertEqual(response.data, {"user": self.user.id,
                        "pointcount": OrderedDict([("points", 0.0),
                                    ("id", self.user.id), ('user',self.user.id)]),
                                         "discount": 0.9,
                                         "prev_count": 100.0})

        self.assertEqual(response.status_code, status.HTTP_200_OK)



    def test_patch_superuser(self):
        self.c.force_login(self.superuser)
        response = self.c.patch(f'/api/accounts/discount/{self.user.id}',
                              {"user": self.user.id,
                               "pointcount": OrderedDict([("points", 0.0), ("id", self.user.id)]),
                               "discount": 0.9,
                               "prev_count": 100.0}
                              , format='json', follow = True)

        obj = Discount.objects.get(user=self.user.id)
        obj.refresh_from_db()

        self.assertEqual(response.data, {"user": self.user.id,
                                         "pointcount": OrderedDict([("points", 0.0),
                                                                    ("id", self.user.id)]),
                                         "discount": 0.9,
                                         "prev_count": 100.0})

        self.assertEqual(response.status_code, status.HTTP_200_OK)

The Discount model:

class Discount(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE)
    pointcount = models.OneToOneField(PointCount,on_delete=models.CASCADE)
    discount = models.FloatField(default=0.05,validators=[MinValueValidator(0),MaxValueValidator(1)]) #range 0-1. 0.05=5%
    prev_count = models.FloatField(default=0,validators=[MinValueValidator(0)]) #points collected previous month

The PointCount model:

class PointCount(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE)
    points = models.FloatField(validators=[MinValueValidator(0)])

The Discount serializer:

class DiscountModelSerializer(serializers.ModelSerializer):
    pointcount = PointCountNestedSerializer()
    class Meta:
        model = Discount
        fields = ['user', 'pointcount', 'discount', 'prev_count']

    def __parce_nested(self, validated_data, field_name, prop_name):
        pointcount_data = validated_data.pop(field_name)
        validated_data.update({prop_name: pointcount_data.get("id")})
        return validated_data

    def create(self, validated_data):
        validated_data = self.__parce_nested(validated_data, 'pointcount', 'pointcount_id')
        return Discount.objects.create(**validated_data)

    def update(self, instance, validated_data):
        pointcount_data = validated_data.pop('pointcount')
        instance = super().update(instance, validated_data)
        instance.pointcount_id = pointcount_data.get('id')
        instance.save()
        return instance

The failure in the tests:

FAIL: test_patch_superuser (apps.accounts.tests.tests_discount.DiscountTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/ubuntu/febPy/eshop/apps/accounts/tests/tests_discount.py", line 106, in test_patch_superuser
    self.assertEqual(response.data, {"user": self.user.id,
AssertionError: {'use[40 chars]nts', 0.0), ('id', 11)]), 'discount': 0.05, 'prev_count': 0.0} != {'use[40 chars]nts', 0.0), ('id', 11)]), 'discount': 0.9, 'prev_count': 100.0}

======================================================================
FAIL: test_put_superuser (apps.accounts.tests.tests_discount.DiscountTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/ubuntu/febPy/eshop/apps/accounts/tests/tests_discount.py", line 84, in test_put_superuser
    self.assertEqual(response.data, {"user": self.user.id,
AssertionError: {'use[54 chars]id', 15)]), 'discount': 0.05, 'prev_count': 0.0} != {'use[54 chars]id', 15), ('user', 15)]), 'discount': 0.9, 'prev_count': 100.0}

----------------------------------------------------------------------
Ran 9 tests in 5.118s

FAILED (failures=2)

When I try to change the serializer directly in browser, everything works well, but there is a problem in tests.