def _get_metadata_value(self, obj, key):
if key not in obj['metadata']:
if isinstance(obj, volume.Volume):
raise exception.VolumeMetadataNotFound(volume_id=obj['id'],
metadata_key=key)
elif isinstance(obj, snapshot.Snapshot):
raise exception.SnapshotMetadataNotFound(snapshot_id=obj['id'],
metadata_key=key)
else:
raise exception.MetadataAbsent()
return obj['metadata'][key]
def _from_db_object(cls, context, backup, db_backup, expected_attrs=None):
if expected_attrs is None:
expected_attrs = []
for name, field in backup.fields.items():
if name in cls.OPTIONAL_FIELDS:
continue
value = db_backup.get(name)
if isinstance(field, fields.IntegerField):
value = value if value is not None else 0
backup[name] = value
if 'metadata' in expected_attrs:
metadata = db_backup.get('backup_metadata')
if metadata is None:
raise exception.MetadataAbsent()
backup.metadata = {item['key']: item['value'] for item in metadata}
backup._context = context
backup.obj_reset_changes()
return backup
def _from_db_object(cls,
context,
snapshot,
db_snapshot,
expected_attrs=None):
if expected_attrs is None:
expected_attrs = []
for name, field in snapshot.fields.items():
if name in cls.OPTIONAL_FIELDS:
continue
value = db_snapshot.get(name)
if isinstance(field, fields.IntegerField):
value = value if value is not None else 0
setattr(snapshot, name, value)
if 'volume' in expected_attrs:
volume = objects.Volume(context)
volume._from_db_object(context, volume, db_snapshot['volume'])
snapshot.volume = volume
if snapshot.cgsnapshot_id and 'cgsnapshot' in expected_attrs:
cgsnapshot = objects.CGSnapshot(context)
cgsnapshot._from_db_object(context, cgsnapshot,
db_snapshot['cgsnapshot'])
snapshot.cgsnapshot = cgsnapshot
if snapshot.group_snapshot_id and 'group_snapshot' in expected_attrs:
group_snapshot = objects.GroupSnapshot(context)
group_snapshot._from_db_object(context, group_snapshot,
db_snapshot['group_snapshot'])
snapshot.group_snapshot = group_snapshot
if 'metadata' in expected_attrs:
metadata = db_snapshot.get('snapshot_metadata')
if metadata is None:
raise exception.MetadataAbsent()
snapshot.metadata = {
item['key']: item['value']
for item in metadata
}
snapshot._context = context
snapshot.obj_reset_changes()
return snapshot
