f8408e2720
Alembic offers the following functionality: - Can emit ALTER statements to a database in order to change the structure of tables and other constructs - Provides a system whereby "migration scripts" may be constructed; each script indicates a particular series of steps that can "upgrade" a target database to a new version, and optionally a series of steps that can "downgrade" similarly, doing the same steps in reverse. - Allows the scripts to execute in some sequential manner. 1. Add Alembic migrations support. 2. Move 001_manila_init.py migration to manila/db/sqlalchemy/alembic/versions/162a3e673105_manila_init.py. 3. Remove manila/db/sqlalchemy/migrate_repo directory. 4. Fix unit tests. 5. Add ability to runtime updrade/downgrade db. Implements bp alembic-instead-of-sqlalchemy-migrate Change-Id: Iadc0d9596e826323ba19bd25be741c401b90b688
42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
# Copyright 2014 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from __future__ import with_statement
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from alembic import context
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from manila.db.sqlalchemy import api as db_api
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from manila.db.sqlalchemy import models as db_models
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def run_migrations_online():
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"""Run migrations in 'online' mode.
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In this scenario we need to create an Engine
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and associate a connection with the context.
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"""
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engine = db_api.get_engine()
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connection = engine.connect()
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target_metadata = db_models.ManilaBase.metadata
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context.configure(connection=connection, # pylint: disable=E1101
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target_metadata=target_metadata)
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try:
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with context.begin_transaction(): # pylint: disable=E1101
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context.run_migrations() # pylint: disable=E1101
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finally:
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connection.close()
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run_migrations_online()
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