Fix migrations upgrade path for MySQL

For some reason, the migration path from unmanaged db (from alembic
point-of-view) to managed db, through the initial migration works well with
sqlite… But not with mysql where the db system tries to re-create the existing
tables.

This commit is a way to detect if we are migrating from pre-alembic era and
skip the first migration (which would do nothing anyway), marking it as already
executed.

It's quite hackish but that's the best I found so far to get it working with
both MySQL and SQLite.

0 files changed, 0 insertions, 0 deletions