# sqlalchemy.exc.StatementError: (sqlalchemy.exc.InvalidRequestError) 'NoneType' object has no attribute 'replace' (original cause: AttributeError: 'NoneType' object has no attribute 'replace') for parameter 'name' value None

- **ID:** `python/sqlalchemy-invalid-escape-sequence`
- **Domain:** python
- **Category:** data_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

Passing None as a parameter to a query that expects a string, and SQLAlchemy's internal processing tries to call .replace() on it.

## Version Compatibility

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

## Workarounds

1. **** (90% success)
   ```
   if name is not None:
    result = session.query(User).filter(User.name == name).all()
else:
    # handle None case separately
   ```
2. **** (85% success)
   ```
   def get_user(name=''):
    result = session.query(User).filter(User.name == name).all()
   ```

## Dead Ends

- **** — May change query semantics; empty string may not be intended. (50% fail)
- **** — Doesn't address the root cause of None being passed. (60% fail)