| #!/usr/bin/env python |
| # encoding: utf-8 |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| |
| from __future__ import with_statement |
| from alembic import context |
| from sqlalchemy import engine_from_config, pool |
| from logging.config import fileConfig |
| |
| import os |
| from ec2stack.core import DB |
| |
| # this is the Alembic Config object, which provides |
| # access to the values within the .ini file in use. |
| config = context.config |
| |
| # Interpret the config file for Python logging. |
| # This line sets up loggers basically. |
| fileConfig(config.config_file_name) |
| |
| # add your model's MetaData object here |
| # for 'autogenerate' support |
| # from myapp import mymodel |
| # target_metadata = mymodel.Base.metadata |
| database_file = os.path.join( |
| os.path.expanduser('~'), |
| '.ec2stack/ec2stack.sqlite' |
| ) |
| |
| config.set_main_option('sqlalchemy.url', 'sqlite:///' + database_file) |
| |
| # other values from the config, defined by the needs of env.py, |
| # can be acquired: |
| # my_important_option = config.get_main_option("my_important_option") |
| # ... etc. |
| |
| |
| def run_migrations_offline(): |
| """Run migrations in 'offline' mode. |
| |
| This configures the context with just a URL |
| and not an Engine, though an Engine is acceptable |
| here as well. By skipping the Engine creation |
| we don't even need a DBAPI to be available. |
| |
| Calls to context.execute() here emit the given string to the |
| script output. |
| |
| """ |
| url = config.get_main_option("sqlalchemy.url") |
| context.configure(url=url) |
| |
| with context.begin_transaction(): |
| context.run_migrations() |
| |
| |
| def run_migrations_online(): |
| """Run migrations in 'online' mode. |
| |
| In this scenario we need to create an Engine |
| and associate a connection with the context. |
| |
| """ |
| engine = engine_from_config( |
| config.get_section(config.config_ini_section), |
| prefix='sqlalchemy.', |
| poolclass=pool.NullPool) |
| |
| connection = engine.connect() |
| context.configure( |
| connection=connection, |
| target_metadata=DB.metadata |
| ) |
| |
| try: |
| with context.begin_transaction(): |
| context.run_migrations() |
| finally: |
| connection.close() |
| |
| if context.is_offline_mode(): |
| run_migrations_offline() |
| else: |
| run_migrations_online() |