FastAPI Pytest why does client returns 422 - pytest

Question

I'm trying to implement testing my post route. It works in my project. I have problems only with pytest.
main.py:
#app.post('/create_service', status_code=status.HTTP_201_CREATED)
async def post_service(
response: Response, service: CreateService, db: Session = Depends(get_db)
):
service_model = models.Service()
service_name = service.name
service_instance = db.query(models.Service).filter(
models.Service.name == service_name
).first()
if service_instance is None:
service_model.name = service_name
db.add(service_model)
db.commit()
serviceversion_model = models.ServiceVersion()
service_instance = db.query(models.Service).filter(
models.Service.name == service_name
).first()
serviceversion_instance = db.query(models.ServiceVersion).filter(
models.ServiceVersion.service_id == service_instance.id
).filter(models.ServiceVersion.version == service.version).first()
if serviceversion_instance:
raise HTTPException(
status_code=400, detail='Version of service already exists'
)
serviceversion_model.version = service.version
serviceversion_model.is_used = service.is_used
serviceversion_model.service_id = service_instance.id
db.add(serviceversion_model)
db.commit()
db.refresh(serviceversion_model)
service_dict = service.dict()
for key in list(service_dict):
if isinstance(service_dict[key], list):
sub_dicts = service_dict[key]
if not sub_dicts:
response.status_code = status.HTTP_400_BAD_REQUEST
return HTTPException(status_code=400, detail='No keys in config')
servicekey_models = []
for i in range(len(sub_dicts)):
servicekey_model = models.ServiceKey()
servicekey_models.append(servicekey_model)
servicekey_models[i].service_id = service_instance.id
servicekey_models[i].version_id = serviceversion_model.id
servicekey_models[i].service_key = sub_dicts[i].get('service_key')
servicekey_models[i].service_value = sub_dicts[i].get('service_value')
db.add(servicekey_models[i])
db.commit()
return 'created'
test_main.py:
def test_create_service(client, db: Session = Depends(get_db)):
key = Key(service_key='testkey1', service_value='testvalue1')
service = CreateService(
name="testname1",
version="testversion1",
is_used=True,
keys=[key, ]
)
response = client.post("/create_service", params={"service": service.dict()})
assert response.status_code == 200
I tried to post service as json, as CreateService instance and finally as params dictionary. I have no errors at response line only with the last one . But I got 422 response status code. What is wrong?
If it can help:
schemas.py
class Key(BaseModel):
service_key: str
service_value: str
class CreateService(BaseModel):
name: str
version: str
is_used: bool
keys: list[Key]
class Config:
orm_mode = True

Answer 1

Don't use params. Use json:
response = client.post("/create_service", json=service.dict())