python config_error ai_generated true

alembic.util.exc.CommandError: Can't locate revision identified by 'abc123'

ID: python/flask-migrate-downgrade-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-05-25First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

Flask-Migrate cannot find a specific migration revision in the migrations folder.

generic

中文

Flask-Migrate无法在迁移文件夹中找到特定的迁移修订版本。

Workarounds

  1. 90% success Check the migration history and use a valid revision 
    flask db history
flask db downgrade <valid_revision>
  2. 85% success Recreate the migration from scratch if necessary 
    flask db stamp head
flask db migrate
flask db upgrade

Dead Ends

Common approaches that don't work:

  1. Deleting the migrations folder and starting over 70% fail

    Loses all migration history; may cause data loss.

  2. Manually editing the migration files 80% fail

    Can cause inconsistency; error-prone.