Почему django rest api framework эндпоинт ломается на тестах, но работает через Postman?

Question

print(“Hello World!”)

Django Rest Framework

Почему django rest api framework эндпоинт ломается на тестах, но работает через Postman?

Привет, вот сами тесты:

class TestUser(APITestCase):
    fake = Faker()

    def generate_data(self):
        path = os.path.join(settings.MEDIA_ROOT, "test_files/climber.webp")
        url = reverse('upload_image')
        with open(path, "rb") as file:
            response = self.client.post(url, {"image": file}, format='multipart')
        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
        photo_id = response.data.get("id")
        fake = Faker()
        return {
            "first_name": fake.first_name(),
            "last_name": fake.last_name(),
            "phone": fake.phone_number(),
            "birthday": fake.date_of_birth().strftime('%Y-%m-%d'),
            "weight": random.randint(50, 100),
            "growth": random.randint(150, 200),
            "photo": photo_id,
            "city_id": random.randint(1, 10),
            "rope_length": random.randint(50, 80),
            "quickdraws": random.randint(5, 15),
            "lead_indoor_climbing": random.choice([True, False]),
            "lead_outdoor_climbing": random.choice([True, False]),
            "indoor_bouldering": random.choice([True, False])
        }

    def setUp(self):

        self.django_user = DjangoUser.objects.create_user(username=self.fake.user_name(), password=self.fake.password())
        self.token = Token.objects.create(user=self.django_user)
        self.api_authentication()
        self.user = User.objects.create(**self.generate_data())

    def api_authentication(self):
        self.client = APIClient()
        self.client.credentials(HTTP_AUTHORIZATION='Token ' + self.token.key)

    def test_create_user(self):
        url = reverse('create_user')
        response = self.client.post(url, self.generate_data(), format='json')
        print(response.data)
        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
        self.assertEqual(User.objects.count(), 2)
        # self.assertEqual(User.objects.get(username='').username, 'newuser')

    def test_create_user_bad_request(self):
        url = reverse('create_user')
        data = self.generate_data()
        data["weight"] = "string"
        response = self.client.post(url, data, format='json')
        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)

Получается есть отдельная модель с изображениями, а поле photo модели User - это ссылка на экземпляр модели с изображениями.

Но я ловлю ошибку:

======================================================================
ERROR: test_create_user_bad_request (finder.tests.test_setup.TestUserSetup)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/levbariakh/web/climbing_tinder/finder/tests/test_setup.py", line 46, in setUp
    self.user = User.objects.create(**self.generate_data())
  File "/Users/levbariakh/web/climbing_tinder/.venv/lib/python3.9/site-packages/django/db/models/manager.py", line 87, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/Users/levbariakh/web/climbing_tinder/.venv/lib/python3.9/site-packages/django/db/models/query.py", line 656, in create
    obj = self.model(**kwargs)
  File "/Users/levbariakh/web/climbing_tinder/.venv/lib/python3.9/site-packages/django/db/models/base.py", line 543, in __init__
    _setattr(self, field.name, rel_obj)
  File "/Users/levbariakh/web/climbing_tinder/.venv/lib/python3.9/site-packages/django/db/models/fields/related_descriptors.py", line 266, in __set__
    raise ValueError(
ValueError: Cannot assign "2": "User.photo" must be a "Image" instance.

----------------------------------------------------------------------
Ran 2 tests in 2.062s

FAILED (errors=2)
Destroying test database for alias 'default'...

Я подумал что надо просто вручную преобразовать id в экземпляр модели Image:

class UserCreateSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = "__all__"

    def create(self, validated_data):
        photo_id = validated_data.get('photo').id
        validated_data.pop("photo")
        try:
            photo = Image.objects.get(id=photo_id)
        except (Image.DoesNotExist, ValueError):
            logger.error(f"Image with id {photo_id} not found")
            raise serializers.ValidationError("Image not found")
        user = User.objects.create(photo=photo, **validated_data)
        return user

При этом через Postman всё работает, что делать?