How do I downgrade with flask migrate?
Situation 1
If I go
flask db migrate -m "my changes"
but have not run flask db upgrade and I want to downgrade flask migrate just delete the migration file
For example
Here is an example where the file is located.
migrations/
└── versions/
└── a1b2c3d4_my_changes.py
rm migrations/versions/a1b2c3d4_my_changes.py or delete the file manually
Situation 2
Also note
do not delete the migration file before running flask db downgrade if that migration has already been applied with flask db upgrade.
If you already ran flask db upgrade you go
flask db downgrade
This will make migrate downgrade.
The previous command is = to flask db downgrade -1.
if I want to further downgrade I go
flask db downgrade a1b2c3d4
Here is an example where the file is located.
migrations/
└── versions/
└── rgegrgrg_original_migration.py
└── a1b2c3d4_my_changes.py
Or I could go
flask db downgrade -2
to downgrade 2 times.
Also to find the correct migration I should go
flask db history
When I try situation 1 then situation 2 I get the error
INFO [alembic.runtime.migration] Context impl SQLiteImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
ERROR [flask_migrate] Error: Target database is not up to date.
How do I fix this?
Also if I made any mistakes in the processes above can someone help? I typed how to do this into ai because I could not find any resources by googling that are recent so I assume the ai made a mistake.