medashare/ui/medashare/alembic/README

New Version
-----------

To create a revision, update the ORM in medashare/orm.py.

Then in the medashare directory, run:
```
./autogen.sh "message of what you did"
```

This will create a version file.  Edit the version file to support the
migration (such as populating new columns).

Once things are tested as good, commit everything.

Differences from template
-------------------------

There are a couple difference, first the `alembic.ini` file
was updated:
```
sqlalchemy.url = sqlite+pysqlite:///:memory:
```

This lets the `--autogenerate` work properly.

The second is that the `env.py:run_migrations_online` was updated with:
```
    if 'engine' in config.attributes:
        connectable = config.attributes['engine']
    else:
```
so that the engine could be passed in directly as opposed to
opening the file again, or passing in the url.

TODO
----

Figure out how to automatically add the `medashare.orm` import to
the script.  The template implies that there is a way, but don't know
where the config comes from.