class: center, middle # Database migrations .meta[Alexander Solovyov, Pycon Ukraine 2011] --- # Migration versioning * 1, 2, 3, 4, 5, ... * Hey, we're using DVCS! --- # Tied to a database adapter * South - Django * sqlalchemy-migration - SQLAlchemy --- # Downgrades * Almost never tested * Often not written * Rarely used --- # Nomad * No downgrades * Migrations in any language * Arbitrary versions: 2011-10-23-no-wei * Dependencies * Database-agnostic (mostly) --- class: center # nomad @ PyPI