101 lines
3.1 KiB
Python
101 lines
3.1 KiB
Python
# 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 logging.config import fileConfig
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from alembic import context
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from sqlalchemy import engine_from_config
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from sqlalchemy import pool
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from cinder.db.sqlalchemy import 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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# Interpret the config file for Python logging unless we're told not to.
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# This line sets up loggers basically.
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if config.attributes.get('configure_logger', True):
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fileConfig(config.config_file_name)
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target_metadata = models.BASE.metadata
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def include_name(name, type_, parent_names):
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# if there are any columns or tables that should be excluded from
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# auto-generation, include them here
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return True
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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 and not an Engine, though an
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Engine is acceptable here as well. By skipping the Engine creation we
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don't even need a DBAPI to be available.
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Calls to context.execute() here emit the given string to the script output.
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"""
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url = config.get_main_option("sqlalchemy.url")
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context.configure(
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url=url,
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target_metadata=target_metadata,
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include_name=include_name,
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literal_binds=True,
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dialect_opts={"paramstyle": "named"},
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)
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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 and associate a connection
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with the context.
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This is modified from the default based on the below, since we want to
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share an engine when unit testing so in-memory database testing actually
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works.
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https://alembic.sqlalchemy.org/en/latest/cookbook.html#connection-sharing
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"""
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connectable = config.attributes.get('connection', None)
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if connectable is None:
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# only create Engine if we don't have a Connection from the outside
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connectable = engine_from_config(
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config.get_section(config.config_ini_section),
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prefix="sqlalchemy.",
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poolclass=pool.NullPool,
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)
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# when connectable is already a Connection object, calling connect() gives
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# us a *branched connection*
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with connectable.connect() as connection:
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context.configure(
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connection=connection,
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target_metadata=target_metadata,
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include_name=include_name,
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)
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with context.begin_transaction():
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context.run_migrations()
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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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