Cannot complete Flask-Migration

Question

I\'ve setup a local Postgres DB with SQLAlchemy and cannot commit my first entry. I keep on getting this error...

ProgrammingError: (ProgrammingError) relation          


        

Answer 1

I ran into a similar issue. After performing the python manage.py db migrate command the database tables were not created, there was only an alembic table in the database.

I found the solution in the flask-migrate documentation: https://flask-migrate.readthedocs.org/en/latest/

The migration script needs to be reviewed and edited, as Alembic currently does not detect every change you make to your models. In particular, Alembic is currently unable to detect indexes. Once finalized, the migration script also needs to be added to version control.

Then you can apply the migration to the database:

python manage.py db upgrade

This command created the tables and applied the database migrations.