Question

我正在使用Morphia 0.99并且我正在尝试更新实体中的嵌入字段，但我不知道如何。

// User entity
@Entity(value = "users", noClassnameStored = true)
public class User
{
    @Id
    private String id;

    @Embedded
    private UserConfig userConfig;
}

// User DAO
public class UserDao extends BasicDAO <User, ObjectId> implements IUserDao
{
    @Override
    public void setConfig (String userId, UserConfig config)
    {
        User user = get (new ObjectId (userId));
        user.setNotificationsTypes (notitypes);
        "this.update(user);"
    }
}

This page提出了这样的建议：

// User DAO
public class UserDao extends BasicDAO <User, ObjectId> implements IUserDao
{
    @Override
    public void setConfig (String userId, UserConfig config)
    {
        Query <User> query = ds.createQuery (User.class).field (idString).equal (userId);
        UpdateOperations <User> ops = ds.createUpdateOperations (User.class).set ("userConfig.someField", "Some Value");
        ds.update (updateQuery, ops);
    }
}

但我想更新整个嵌入式字段，而不是逐个更新每个子字段。我怎样才能做到这一点？谢谢！

如何更新@Embedded字段

0 个答案: