89 lines
2.6 KiB
Python
89 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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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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'''
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Alembic environment script as generated by alembic init, modified to
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use the Flask app context and Flask-SQLAlchemy extension rather than
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the traditional raw SQLAlchemy engine.
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'''
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from __future__ import with_statement
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from alembic import context
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import configparser
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from logging.config import fileConfig
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import os
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from python_nemesis.extensions import db
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from sqlalchemy import engine_from_config
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from sqlalchemy import pool
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config = context.config
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fileConfig(config.config_file_name)
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target_metadata = db.metadata
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config_file = os.environ.get("NEMESIS_CONFIG",
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"/etc/nemesis/nemesis.conf")
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nem_config = configparser.ConfigParser()
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nem_config.readfp(open(config_file))
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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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url = nem_config.get('sqlalchemy', 'database_uri')
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context.configure(
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url=url, target_metadata=target_metadata, literal_binds=True)
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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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db_uri = nem_config.get('sqlalchemy', 'database_uri')
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config_dict = {"sqlalchemy.url": db_uri}
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connectable = engine_from_config(config_dict,
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prefix='sqlalchemy.',
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poolclass=pool.NullPool)
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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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)
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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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