The oslo_db.sqlalchemy.migration_cli.ext_alembic Module¶

class oslo_db.sqlalchemy.migration_cli.ext_alembic.AlembicExtension(engine, migration_config)¶

Bases: oslo_db.sqlalchemy.migration_cli.ext_base.MigrationExtensionBase

Extension to provide alembic features.

Parameters:	engine (sqlalchemy.engine.Engine) – SQLAlchemy engine instance for a given database migration_config (dict) – Stores specific configuration for migrations

downgrade(version)¶

Used for downgrading database.

Parameters:	version (string) – Desired database version

enabled¶

has_revision(rev_id)¶

Checks whether the repo contains a revision

Parameters:	rev_id – Revision to check
Returns:	Whether the revision is in the repo
Return type:	bool

order = 2¶

revision(message='', autogenerate=False)¶

Creates template for migration.

Parameters:	message (string) – Text that will be used for migration title autogenerate (bool) – If True - generates diff based on current database state

stamp(revision)¶

Stamps database with provided revision.

Parameters:	revision (string) – Should match one from repository or head - to stamp database with most recent revision

upgrade(version)¶

Used for upgrading database.

Parameters:	version (string) – Desired database version

version()¶

Current database version.

Returns:	Databse version
Return type:	string