Is there a way to do a Ref get with @Load in a query if you only have an ID for a property?

[Tony Park]

Is there a way to do a Ref get with @Load in a query if you only have an ID for a property?

Normally a Ref would look like this:

@Entity
class Car {
    @Id Long id;
    @Load Ref<Person> driver; 

}

But what if you had this:

@Entity
class Car {
    @Id Long id;
    Long driverId; // You know this is a Person entity

}

Storing Keys as a property in an entity is useful when using Ref with @Load but Keys are at least 4x larger than a simple long ID. 

A long is 8 bytes but a key (depending on the entity name) is 16 bytes + 8 bytes for long id + string length of entity name (e.g. 8 bytes) = 32 bytes. 

If there is a way to @Load entities without storing keys, it would save a bit of space.

[Jeff Schnitzer]

Ooof, that's a tough one. I'm afraid there isn't. It would require pretty significant work ofy's internals. That @Load stuff is the most complicated part, especially because Objectify preserves the facade of async behavior (that's no longer async because the google libraries no longer support async).

Jeff

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[Tony Park]

I see, I figured it may be a bit involved. Thanks.