Rename ObjectId _id to id in jackson deserialization with Jongo and MongoDB

Question

I\'ve just started working on a project using the play framework,jongo and MongoDB. The project was initially written in Play 2.1 with pojos with an String id field annotat

Answer 1

ObjectIdSerializer always writes property mapped with @ObjectId to a new instance of ObjectId. This is wrong when you map this property to a String.

To avoid this behaviour, I've write a NoObjectIdSerializer :

public class NoObjectIdSerializer extends JsonSerializer {
    @Override
    public void serialize(String value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException {
        jgen.writeString(value);
    }
}

used like this :

@ObjectId
@JsonSerialize(using = NoObjectIdSerializer.class)
protected final String _id;

There is an open issue.