ember-data: How to tell if a model's async: true relationship is loaded without triggering a load?

Question

I need to check if an async relationship has been loaded without triggering the load, is this possible?

Answer 1

After time has passed, Ember Data 2.5 got released. One of implemented features is the ds-references feature.

The references API allows to interact with your relationships. With it, it is possible to check if your RelationshipName is already loaded, without triggering a request:

model.hasMany('yourRelationshipName').value() !== null;

Answer 2

With ember-data 1.13, the following will work for a hasMany relationship. Still a hack, but there does not seem to be a public API.

var relationships = model._internalModel._relationships.initializedRelationships;

if (relationships.yourRelationshipName.manyArray.get('isLoaded')) {...}