python data_error ai_generated true

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

Also available as: JSON · Markdown · 中文
80%Fix Rate
82%Confidence
0Evidence
2025-05-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

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.

generic

中文

将 None 作为参数传递给期望字符串的查询，SQLAlchemy 内部处理尝试对其调用 .replace()。

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

Common approaches that don't work:

  1. 50% fail

    May change query semantics; empty string may not be intended.

  2. 60% fail

    Doesn't address the root cause of None being passed.