Java MongoDB只保存ID

Question

出于某种原因，我的Mongo DB只是创建一个属于文档的ID，而不是其他属性。

我有一个Spring @Repository：

@Repository
public class BeerRepository {

    public void createBeer(final BeerDTO beerDTO) {

        Mongo mongo = new Mongo("localhost", 27017);
        DB db = mongo.getDB("beers");

        DBCollection beerCollection = db.getCollection(BeerDTO.COLLECTION_NAME);

        beerCollection.insert(beerDTO);
//        System.err.println(beerCollection.findOne());
    }
}

一个简单的POJO，没有别的：

@Document
public class BeerDTO extends BasicDBObject {

    private static final long serialVersionUID = 1235041607375829595L;
    public static final String COLLECTION_NAME = "Beers";

    @Field("id")
    private String id;

    @Field("name")
    private String name;

    @Field("abv")
    private int abv; //alcohol by volume

    public BeerDTO(String id, String name, int abv) {
        this.id = id;
        this.name = name;
        this.abv = abv;
    }

}

然而，这是Mongo唯一得到的东西：

非常感谢！

Answer 1

我在repo中改变了createBeer的方法并且它有效：

public void createBeer(final BeerDTO beerDTO) {

        MongoClient mongoClient = new MongoClient();
        DB database = mongoClient.getDB("beers");
        DBCollection beerCollection = database.getCollection(BeerDTO.COLLECTION_NAME);

        DBObject beer = new BasicDBObject("id", beerDTO.getId())
                .append("name", beerDTO.getName())
                .append("abv", beerDTO.getAbv());

        beerCollection.insert(beer);
    }