75 lines
1.9 KiB
Python
75 lines
1.9 KiB
Python
# -*- coding: utf-8; mode: python; -*-
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"""
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Alembic environment script
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"""
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from alembic import context
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from sqlalchemy.orm import configure_mappers
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from rattail.config import make_config
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from rattail.db.util import get_default_engine
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from rattail.db.continuum import configure_versioning
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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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alembic_config = context.config
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# use same config file for Rattail
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rattail_config = make_config(alembic_config.config_file_name, usedb=False, versioning=False)
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# configure Continuum..this is trickier than we want but it works..
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configure_versioning(rattail_config, force=True)
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from rattail_demo.db import model
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configure_mappers()
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# needed for 'autogenerate' support
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target_metadata = model.Base.metadata
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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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engine = get_default_engine(rattail_config)
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context.configure(
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url=engine.url,
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target_metadata=target_metadata)
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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 = get_default_engine(rattail_config)
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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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