Can the following two update operations take place in one single transaction?
Query<Group> query1 = createQuery().disableValidation().field("users").equal(user.getUserId()).retrievedFields(true, "_id","users");
UpdateOperations<Group> ops1 = createUpdateOperations().removeAll("users", user);
update(query1, ops1);
Query<Group> query = createQuery().field("_id").in(groupList);
UpdateOperations<Group> ops = createUpdateOperations().add("users", user);
update(query, ops);
There are no multidocument transactions in mongodb. Writes to a single document are atomic, however. So no, there is no way to do that via morphia either.