python module_error ai_generated true

AttributeError: module 'sqlalchemy.orm' has no attribute 'sessionmaker'

ID: python/sqlalchemy-missing-sessionmaker

Also available as: JSON · Markdown · 中文
80%Fix Rate
90%Confidence
0Evidence
2024-01-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.4.x active — — —
2.0.x active — — —

Root Cause

Importing sessionmaker incorrectly, e.g., from sqlalchemy.orm import sessionmaker is correct, but some may do from sqlalchemy import orm and then orm.sessionmaker which doesn't exist.

generic

中文

错误地导入 sessionmaker，例如 from sqlalchemy.orm import sessionmaker 是正确的，但有些人可能使用 from sqlalchemy import orm 然后 orm.sessionmaker，这不存在。

Workarounds

  1. 100% success 
    Import correctly: from sqlalchemy.orm import sessionmaker
  2. 100% success 
    Use Session = sessionmaker(bind=engine) after correct import.

Dead Ends

Common approaches that don't work:

  1. 90% fail

    sessionmaker is not in the top-level sqlalchemy namespace; it's in sqlalchemy.orm.

  2. 80% fail

    The correct name is sessionmaker (no underscore).