如何在链接到帮助程序中传递DS.PromiseObject作为模型？

So i have the following models:

所以我有以下型号：

var User = DS.Model.extend({
  name: DS.attr('string'),
  defaultRealm: DS.belongsTo('realm', { async: true })
 }); 

var Realm = DS.Model.extend({
  name: DS.attr('string')
});
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