# AttributeError: 'Query' object has no attribute 'filter_by'

- **ID:** `python/sqlalchemy-orm-query-attribute-error`
- **Domain:** python
- **Category:** runtime_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

Using SQLAlchemy 2.0 style query incorrectly with old API.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |

## Workarounds

1. **Use session.execute() with select() in 2.0 style.** (95% success)
   ```
   from sqlalchemy import select
stmt = select(User).where(User.name == 'Alice')
result = session.execute(stmt).scalars().all()
   ```
2. **Use session.query() correctly.** (90% success)
   ```
   users = session.query(User).filter_by(name='Alice').all()
   ```

## Dead Ends

- **Installing older version of SQLAlchemy.** — Downgrading may break other features. (50% fail)
- **Using session.query().filter_by() without parentheses.** — Method call syntax still required. (70% fail)