MongoDB Java驱动程序将嵌套对象的id字段转换为_id
我有一个嵌套对象,其中定义了一个MongoDB Java驱动程序将嵌套对象的id字段转换为_id,java,mongodb,mongodb-java,Java,Mongodb,Mongodb Java,我有一个嵌套对象,其中定义了一个id字段,当持久化到mongodb中时,该字段被转换为\u id。我试图避免这种情况,因为嵌套对象的id字段不是ObjectId 这里有两个简单的POJO实体 Tenant.java @Getter @Setter @AllArgsConstructor @NoArgsConstructor public class Tenant { private ObjectId id; private AppClient appClient; pr
id
字段,当持久化到mongodb中时,该字段被转换为\u id
。我试图避免这种情况,因为嵌套对象的id字段不是ObjectId
这里有两个简单的POJO实体
Tenant.java
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
public class Tenant {
private ObjectId id;
private AppClient appClient;
private Date createdAt;
}
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
public class AppClient {
private String id;
private String secret;
private String role;
}
AppClient.java
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
public class Tenant {
private ObjectId id;
private AppClient appClient;
private Date createdAt;
}
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
public class AppClient {
private String id;
private String secret;
private String role;
}
这就是我创建租户并使用mongodb java驱动程序持久化的示例方法
public class MainTest {
public static void main(String[] args) {
ConnectionString connString = new ConnectionString("mongodb://127.0.0.1:27017");
CodecRegistry pojoCodecRegistry = fromProviders(PojoCodecProvider.builder().automatic(true).build());
CodecRegistry codecRegistry = fromRegistries(MongoClientSettings.getDefaultCodecRegistry(), pojoCodecRegistry);
MongoClientSettings settings = MongoClientSettings.builder()
.applyConnectionString(connString)
.codecRegistry(codecRegistry)
.build();
MongoClient mongoClient = MongoClients.create(settings);
MongoCollection<Tenant> mongoCollection = mongoClient.getDatabase("alpha").getCollection("tenant", Tenant.class);
Tenant tenant = new Tenant();
AppClient appClient = new AppClient();
appClient.setId("12312313");
tenant.setAppClient(appClient);
mongoCollection.insertOne(tenant);
Tenant findResult = mongoCollection.find(new Document().append("appClient.id", "12312313")).first();
}
这导致在按id搜索内部文档时出现问题。因此,在上面的示例中,findResult将为null,因为没有定义任何
id
字段。谢谢你的帮助。无论如何谢谢你 刚刚发现mongodb java驱动程序将每个名为id
的字段默认为\u id
。因此,解决方法是更改默认约定类型ANNOTATION\u convention
,如下所示
PojoCodecProvider.builder().conventions(asList(Conventions.ANNOTATION_CONVENTION)).automatic(true).build();
此外,我们必须用BsonId注释id字段,它是一个ObjectId。我们的房客POJO看起来像
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
public class Tenant {
@BsonId
private ObjectId id;
private AppClient appClient;
private Date createdAt;
}
相关行为的解释见