Spring Boot和Mongo -如何按嵌套属性查询

spring.data.mongodb.host=127.0.0.1
spring.data.mongodb.port=27017
spring.data.mongodb.database=mydb

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

@Document(collection = "users")
public class User {
    @Id
    private String id;
    private String name;
    private Address address;
    
    // getters and setters
}

public class Address {
    private String city;
    private String country;
    
    // getters and setters
}

import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.data.mongodb.repository.Query;

public interface UserRepository extends MongoRepository<User, String> {
    @Query("{'address.city': ?0}")
    List<User> findByCity(String city);
}

@Service
public class UserService {
    @Autowired
    private UserRepository userRepository;

    public List<User> getUsersByCity(String city) {
        return userRepository.findByCity(city);
    }
}