Fastapi get_current_user dependency doesn't work - api

Question

Please help me, I have no idea what is wrong - my get_current_user dependency throws an 422 Unprocessable entity errror.
I am working on authorization and database connection in my project.
I am trying to create a get_user_me endpoint, which will get and return current user.
#router.get("/me")
def get_user_me(current_user = Depends(get_current_user)):
return current_user
get_current_user dependency should return current user, but it throws HTTP422 (Unprocesable entity).
def get_current_user(db: Session = Depends(get_db), token: str = Depends(oauth2_scheme)):
credentials_exception = HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Could not validate credentials",
headers={"WWW-Authenticate": "Bearer"}
)
try:
payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
username: str = payload.get("sub")
if not username:
raise credentials_exception
token_data = TokenData(username=username)
except JWTError:
raise credentials_exception
user = get_user_by_username(db, token_data.username)
if not user:
raise credentials_exception
return user
Everything works fine until the return. The user is a correct model, but when I step over in the debugger (it should go back to the endpoint) it redirects me to closing my localsession (db.close):
def get_db():
db = SessionLocal()
try:
yield db
finally:
db.close()
I am working with debugger, and in the last line (return user) the user is just a normal model.
>>>user
<src.models.users.User object at 0x0000023B377A14E0>
>>>user.id
0
>>>user.username
'olekniemirka'
Response body I get in the api docs:
{
"detail": [
{
"loc": [
"path",
"user_id"
],
"msg": "value is not a valid integer",
"type": "type_error.integer"
}
]
}
Logs I get in the terminal:
INFO: Started server process [12012]
INFO: Waiting for application startup.
INFO: Application startup complete.
INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
2022-11-29 20:45:55,319 INFO sqlalchemy.engine.Engine select pg_catalog.version()
2022-11-29 20:45:55,320 INFO sqlalchemy.engine.Engine [raw sql] {}
2022-11-29 20:45:55,322 INFO sqlalchemy.engine.Engine select current_schema()
2022-11-29 20:45:55,322 INFO sqlalchemy.engine.Engine [raw sql] {}
2022-11-29 20:45:55,322 INFO sqlalchemy.engine.Engine show standard_conforming_strings
2022-11-29 20:45:55,323 INFO sqlalchemy.engine.Engine [raw sql] {}
2022-11-29 20:45:55,324 INFO sqlalchemy.engine.Engine BEGIN (implicit)
2022-11-29 20:45:55,329 INFO sqlalchemy.engine.Engine SELECT users.id, users.username, users.name, users.surname, users.email, users.hashed_password
FROM users
WHERE users.username = %(username_1)s
2022-11-29 20:45:55,329 INFO sqlalchemy.engine.Engine [generated in 0.00062s] {'username_1': 'olekniemirka'}
2022-11-29 20:51:20,858 INFO sqlalchemy.engine.Engine ROLLBACK
INFO: 127.0.0.1:49643 - "GET /users/me HTTP/1.1" 422 Unprocessable Entity
I don't get why, but get_user works just fine (it also uses get_current_user dependency), but the current user is not used anywhere.
It's like the assignment of user to the current_user in my first endpoint is breaking the app.
#router.get("/{user_id}", status_code=status.HTTP_200_OK)
def get_user(user_id: int, db: Session = Depends(get_db), current_user: models.User = Depends(get_current_user)):
user = crud.get_user(db, user_id)
return user
# crud get user
def get_user(db: Session, id: int):
stmt = select(models.User).where(models.User.id == id)
user = db.scalar(stmt)
return user

Answer 1

Deleting Config class from my pydantic model solved the problem for some reason, but it is a very ugly solution.
class Config:
orm_mode=True
EDIT:
Answer which solved the question by #MatsLindh
You're trying to retrieve /users/me, but have defined user_id to be int. In that case you're trying to coerce me into an integer, and FastAPI is telling you that "no, the value you're giving for user_id is not an integer". The 422 error is related to that issue, not current_user. Since your /{user_id} endpoint was registered first, that takes precedence over the /me endpoint.