oslo_db.sqlalchemy.migration_cli package¶

Submodules¶

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

property enabled¶

Used for availability verification of a plugin.

Return type

bool

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

oslo_db.sqlalchemy.migration_cli.ext_base module¶

class oslo_db.sqlalchemy.migration_cli.ext_base.MigrationExtensionBase¶

Bases: object

abstract downgrade(version)¶

Used for downgrading database.

Parameters

version (string) – Desired database version

property enabled¶

Used for availability verification of a plugin.

Return type

bool

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 = 0¶

revision(*args, **kwargs)¶

Used to generate migration script.

In migration engines that support this feature, it should generate new migration script.

Accept arbitrary set of arguments.

stamp(*args, **kwargs)¶

Stamps database based on plugin features.

Accept arbitrary set of arguments.

abstract upgrade(version)¶

Used for upgrading database.

Parameters

version (string) – Desired database version

abstract version()¶

Current database version.

Returns

Databse version

Return type

string

oslo_db.sqlalchemy.migration_cli.ext_migrate module¶

class oslo_db.sqlalchemy.migration_cli.ext_migrate.MigrateExtension(engine, migration_config)¶

Bases: oslo_db.sqlalchemy.migration_cli.ext_base.MigrationExtensionBase

Extension to provide sqlalchemy-migrate features.

Parameters

migration_config (dict) – Stores specific configuration for migrations

downgrade(version)¶

Used for downgrading database.

Parameters

version (string) – Desired database version

property enabled¶

Used for availability verification of a plugin.

Return type

bool

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 = 1¶

upgrade(version)¶

Used for upgrading database.

Parameters

version (string) – Desired database version

version()¶

Current database version.

Returns

Databse version

Return type

string

oslo_db.sqlalchemy.migration_cli.manager module¶

class oslo_db.sqlalchemy.migration_cli.manager.MigrationManager(migration_config, engine=None)¶

Bases: object

downgrade(revision)¶

Downgrade database with available backends.

revision(message, autogenerate)¶

Generate template or autogenerated revision.

stamp(revision)¶

Create stamp for a given revision.

upgrade(revision)¶

Upgrade database with all available backends.

version()¶

Return last version of db.

oslo_db.sqlalchemy.migration_cli.manager.check_plugin_enabled(ext)¶

Used for EnabledExtensionManager.

Module contents¶