97 lines
2.6 KiB
Python
97 lines
2.6 KiB
Python
# Copyright (c) 2013 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Based on Neutron's migration/cli.py
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from __future__ import with_statement
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from logging import config as c
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from alembic import context
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from oslo_utils import importutils
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from sqlalchemy import create_engine
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from sqlalchemy import pool
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from sahara.db.sqlalchemy import model_base
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importutils.try_import('sahara.db.sqlalchemy.models')
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# this is the Alembic Config object, which provides
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# access to the values within the .ini file in use.
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config = context.config
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sahara_config = config.sahara_config
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# Interpret the config file for Python logging.
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# This line sets up loggers basically.
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c.fileConfig(config.config_file_name)
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# add your model's MetaData object here
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# for 'autogenerate' support
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# from myapp import mymodel
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# target_metadata = mymodel.Base.metadata
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target_metadata = model_base.SaharaBase.metadata
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# other values from the config, defined by the needs of env.py,
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# can be acquired:
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# my_important_option = config.get_main_option("my_important_option")
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# ... etc.
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def run_migrations_offline():
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"""Run migrations in 'offline' mode.
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This configures the context with just a URL
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and not an Engine, though an Engine is acceptable
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here as well. By skipping the Engine creation
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we don't even need a DBAPI to be available.
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Calls to context.execute() here emit the given string to the
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script output.
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"""
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context.configure(url=sahara_config.database.connection)
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with context.begin_transaction():
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context.run_migrations()
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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 = create_engine(
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sahara_config.database.connection,
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poolclass=pool.NullPool)
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connection = engine.connect()
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context.configure(
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connection=connection,
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target_metadata=target_metadata)
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try:
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with context.begin_transaction():
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context.run_migrations()
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finally:
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connection.close()
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()
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