- image_checksum = req_params.image_checksum if req_params.has_field("image_checksum") else None
- params.image_id = yield from self.get_image_id_from_image_info(req_params.image_name, image_checksum)
+ if 'image_name' in req_params:
+ image_checksum = req_params.image_checksum if req_params.has_field("image_checksum") else None
+ params.image_id = yield from self.get_image_id_from_image_info(req_params.image_name, image_checksum)