在Spring Data MongoDB中的集合中添加一个带有默认值的新字段

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

@Document(collection = "your_collection_name")
public class YourEntity {
    @Id
    private String id;

    @Field("new_field")
    @Value("default_value")
    private String newField;

    // 其他字段和方法
}

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

public interface YourRepository extends MongoRepository<YourEntity, String> {
    // 自定义方法
}

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

@Service
public class YourService {
    private final YourRepository yourRepository;

    @Autowired
    public YourService(YourRepository yourRepository) {
        this.yourRepository = yourRepository;
    }

    public void addDocumentWithDefaultField() {
        YourEntity entity = new YourEntity();
        // 设置其他字段的值
        yourRepository.save(entity);
    }
}