如何让Spring Data Couchbase持久化id字段？

import org.springframework.data.annotation.Id;
import org.springframework.data.couchbase.core.mapping.Document;

@Document
public class MyEntity {
    @Id
    private String id;
    // other fields and methods
}

spring.data.couchbase.bootstrap-hosts=localhost
spring.data.couchbase.bucket.name=myBucket
spring.data.couchbase.bucket.password=myPassword

import org.springframework.data.couchbase.repository.CouchbaseRepository;

public interface MyEntityRepository extends CouchbaseRepository<MyEntity, String> {
    // additional custom queries can be defined here
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class MyService {
    private final MyEntityRepository repository;

    @Autowired
    public MyService(MyEntityRepository repository) {
        this.repository = repository;
    }

    public void saveEntity(MyEntity entity) {
        repository.save(entity);
    }

    // other methods
}