serializePolymorphicType with async property

[lumenlunae]

Seems like with an async property, my belongsTo relationship that returns a DS.PromiseObject fails to properly serialize.

This line fails:

json[key + "Type"] = Ember.String.camelize(belongsTo.constructor.typeKey);

because belongsTo.constructor returns DS.PromiseObject

So far, this fix looks to work:

if (belongsTo.constructor === DS.PromiseObject) {
json[key + "Type"] = Ember.String.camelize(belongsTo.content.constructor.typeKey);
} else {
json[key + "Type"] = Ember.String.camelize(belongsTo.constructor.typeKey);
}

Just seeing if it's actually a bug or I might be missing something fundamental. Thanks!

[luketheobscure]

Dupes this issue I think: #2385

[lumenlunae]

Oh! Thanks, and the solution looks much better executed. Thank you!