Mercurial > libervia-backend
diff sat/memory/migration/env.py @ 3715:b9718216a1c0 0.9
merge bookmark 0.9
author | Goffi <goffi@goffi.org> |
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date | Wed, 01 Dec 2021 16:13:31 +0100 |
parents | 71516731d0aa |
children | 54c249ec35ce |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sat/memory/migration/env.py Wed Dec 01 16:13:31 2021 +0100 @@ -0,0 +1,85 @@ +import asyncio +from logging.config import fileConfig +from sqlalchemy import pool +from sqlalchemy.ext.asyncio import create_async_engine +from alembic import context +from sat.memory import sqla_config +from sat.memory.sqla_mapping import Base + +# 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 +target_metadata = Base.metadata + +# 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. + + """ + db_config = sqla_config.getDbConfig() + context.configure( + url=db_config["url"], + target_metadata=target_metadata, + literal_binds=True, + dialect_opts={"paramstyle": "named"}, + ) + + with context.begin_transaction(): + context.run_migrations() + + +def do_run_migrations(connection): + context.configure( + connection=connection, + target_metadata=target_metadata, + render_as_batch=True + ) + + with context.begin_transaction(): + context.run_migrations() + + +async 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. + + """ + db_config = sqla_config.getDbConfig() + engine = create_async_engine( + db_config["url"], + poolclass=pool.NullPool, + future=True, + ) + + async with engine.connect() as connection: + await connection.run_sync(do_run_migrations) + + +if context.is_offline_mode(): + run_migrations_offline() +else: + asyncio.run(run_migrations_online())