diff options
Diffstat (limited to 'nova/db/main/migrations/env.py')
| -rw-r--r-- | nova/db/main/migrations/env.py | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/nova/db/main/migrations/env.py b/nova/db/main/migrations/env.py index 54f67103f6..7401e50646 100644 --- a/nova/db/main/migrations/env.py +++ b/nova/db/main/migrations/env.py @@ -27,18 +27,28 @@ config = context.config if config.attributes.get('configure_logger', True): fileConfig(config.config_file_name) -# add your model's MetaData object here -# for 'autogenerate' support -# from myapp import mymodel -# target_metadata = mymodel.Base.metadata +# this is the MetaData object for the various models in the main database target_metadata = models.BASE.metadata def include_name(name, type_, parent_names): if type_ == 'table': + # NOTE(stephenfin): We don't have models corresponding to the various + # shadow tables. Alembic doesn't like this. Tell Alembic to look the + # other way. Good Alembic. return not name.startswith('shadow_') if type_ == 'column': + # NOTE(stephenfin): This is a list of fields that have been removed + # from various SQLAlchemy models but which still exist in the + # underlying tables. Our upgrade policy dictates that we remove fields + # from models at least one cycle before we remove the column from the + # underlying table. Not doing so would prevent us from applying the + # new database schema before rolling out any of the new code since the + # old code could attempt to access data in the removed columns. Alembic + # identifies this temporary mismatch between the models and underlying + # tables and attempts to resolve it. Tell it instead to ignore these + # until we're ready to remove them ourselves. return (parent_names['table_name'], name) not in { ('instances', 'internal_id'), ('instance_extra', 'vpmems'), @@ -60,6 +70,7 @@ def run_migrations_offline(): context.configure( url=url, target_metadata=target_metadata, + render_as_batch=True, include_name=include_name, literal_binds=True, dialect_opts={"paramstyle": "named"}, @@ -98,6 +109,7 @@ def run_migrations_online(): context.configure( connection=connection, target_metadata=target_metadata, + render_as_batch=True, include_name=include_name, ) |