[BUG] Error in example about connecting with SQLAlchemy

Describe the bug Facing an error with example sql_app from the tutorial SQL (Relational) Databases.

  File "./sql_app/main.py", line 25, in create_user
    db_user = crud.get_user_by_email(db, email=user.email)
  File "./sql_app/crud.py", line 11, in get_user_by_email
    return db.query(models.User).filter(models.User.email == email).first()
  AttributeError: 'generator' object has no attribute 'query'

To Reproduce Follow instruction from the example (link above):

1. Create files into sql_app directory.
2. Run venv/bin/uvicorn sql_app.main:app --reload
3. http://127.0.0.1:8000/docs
4. Execute the Create user operation

Environment:

• OS: Linux, Ubuntu 18.04.3 LTS
• Python 3.7.3
• FastAPI 0.39.0
• SQLAlchemy 1.3.10

[pspierce]

I am seeing this same issue in .52 using almost verbatim the doc examples with postgres. Depends is not calling the function but returning what appears to be an instantiate Depends object.

[H0r53]

The reference previously posted by @peilion seems to no longer be a valid URL. Following the same example as the OP, I am receiving the following error: 'Depends' object has no attribute 'query'. This is because I’m using the db: Session = Depends(get_db) approach to access SessionLocal. If I attempt to get a db session by calling get_db directly, then I receive the 'generator' object has no attribute 'query' error that the OP originally mentioned. This is with FastAPI version .53