mongodb - eq expression with objectId generates wrong path

[metawave]

If one has an entity person with a manual handled reference (without the morphia @Reference annotation) saving an ObjectId in the object for a reference to an Address entity as shown below.

class Person {
   @Id
   ObjectId id;

   String name;

   // manual reference to an address
   ObjectId addressId;
}

the morphia serializer doesn't respect the query:

QPerson.person.addressId.eq(<objectId>)

as shown in the code in the com.mysema.query.mongodb.MongodbSerializer#getKeyForPath:

    protected String getKeyForPath(Path<?> expr, PathMetadata<?> metadata) {
        if (expr.getType().equals(ObjectId.class)) {
            return "_id";
        } else {
            return metadata.getElement().toString();
        }
    }

every path with an objectId type on field automatically gets translated to _id instead of the addressId as shown in the query path expression.

[Shredder121]

Thanks for the report.