68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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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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import os
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import alembic
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from alembic import config as alembic_config
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from alembic import migration as alembic_migration
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from placement.db.sqlalchemy import models
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from placement import db_api as placement_db
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def get_engine():
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return placement_db.get_placement_engine()
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def _alembic_config():
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path = os.path.join(os.path.dirname(__file__), "alembic.ini")
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config = alembic_config.Config(path)
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return config
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def create_schema(engine=None):
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"""Create schema from models, without a migration."""
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base = models.BASE
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if engine is None:
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engine = get_engine()
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base.metadata.create_all(engine)
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def version(config=None, engine=None):
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"""Current database version.
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:returns: Database version
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:rtype: string
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"""
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if engine is None:
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engine = get_engine()
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with engine.connect() as conn:
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context = alembic_migration.MigrationContext.configure(conn)
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return context.get_current_revision()
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def upgrade(revision, config=None):
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"""Used for upgrading database.
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:param version: Desired database version
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:type version: string
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"""
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revision = revision or "head"
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config = config or _alembic_config()
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alembic.command.upgrade(config, revision)
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