def db_sync(version=None):
if version is not None:
try:
version = int(version)
except ValueError:
raise exception.TuskarException(_("version should be an integer"))
current_version = db_version()
repository = _find_migrate_repo()
if version is None or version > current_version:
return versioning_api.upgrade(get_engine(), repository, version)
else:
return versioning_api.downgrade(get_engine(), repository, version)
def db_version():
repository = _find_migrate_repo()
try:
return versioning_api.db_version(get_engine(), repository)
except versioning_exceptions.DatabaseNotControlledError:
meta = sqlalchemy.MetaData()
engine = get_engine()
meta.reflect(bind=engine)
tables = meta.tables
if len(tables) == 0:
db_version_control(migration.INIT_VERSION)
return versioning_api.db_version(get_engine(), repository)
else:
# Some pre-Essex DB's may not be version controlled.
# Require them to upgrade using Essex first.
raise exception.TuskarException(
_("Upgrade DB using Essex release first."))
def __get_backend(self):
if not self.__backend:
if self.__config_group is None:
backend_name = CONF[self.__pivot]
else:
backend_name = CONF[self.__config_group][self.__pivot]
if backend_name not in self.__backends:
msg = _('Invalid backend: %s') % backend_name
raise exception.TuskarException(msg)
backend = self.__backends[backend_name]
if isinstance(backend, tuple):
name = backend[0]
fromlist = backend[1]
else:
name = backend
fromlist = backend
self.__backend = __import__(name, None, None, fromlist)
return self.__backend
