def run_migrations_online()

in migrations/env.py [0:0]

• 17 lines of code
• 2 McCabe index (conditional complexity)

def run_migrations_online() -> None:
    """Run migrations in 'online' mode."""
    configuration = alembic_config.get_section(alembic_config.config_ini_section) or {}
    configuration["sqlalchemy.url"] = sync_sqlalchemy_url

    connectable = sqlalchemy.engine_from_config(
        configuration,
        prefix="sqlalchemy.",
        poolclass=sqlalchemy.pool.NullPool,
    )

    with connectable.connect() as connection:
        alembic.context.configure(
            connection=connection,
            target_metadata=target_metadata,
            render_item=render_item_override,
            process_revision_directives=process_revision_directives_custom_naming,
        )

        with alembic.context.begin_transaction():
            alembic.context.run_migrations()