The code at https://github.com/kurko/ember-sync/blob/master/dist/ember-sync.js#L640-L666 would become something like this:
setRelationships: function(pendingRecord) {
var _this = this,
offlineRecord = this.get('offlineRecord'),
type = this.get('jobRecord.jobRecordType');
// ====== new code =======
return new Ember.RSVP.Promise(function(resolveRelationships, reject) {
/**
* We need to loop relationships. If no record was
* passed in, we need to create a new one, fake, so we know about the
* relationships.
*/
if (!offlineRecord) {
offlineRecord = this.onlineStore.push(type, {id: 1});
}
offlineRecord.eachRelationship(function(name, descriptor) {
var key = descriptor.key,
kind = descriptor.kind,
type = descriptor.type,
relation, onlineRelation;
/**
* TODO - implement for when `.get(relation)` returns a Promise.
*/
// ====== new code =======
relation = RSVP.resolve(offlineRecord.get(name));
// I'm not sure if offlineRecord.get(name) is still the same in Ember Data,
// it could have changed so beware. Here, `name` is the relationship name.
relation.then(function(relation) {
/**
* We need to attach relationships to the main record. If the
* relationships don't exist anymore offline, we need to generate a new
* one, fake, with the same ID, just to send to the server.
*/
if (kind == "belongsTo") {
var relationId = _this.get('jobRecord.serialized')[name];
if (relationId && !relation) {
relation = _this.onlineStore.push(type, {id: relationId});
}
if (relation) {
onlineRelation = _this.generateRelationForRecord(type, relation);
pendingRecord.set(key, onlineRelation);
}
} else if (kind == "hasMany") {
relation.forEach(function(relation) {
onlineRelation = _this.generateRelationForRecord(type, relation);
pendingRecord.get(name).pushObject(onlineRelation);
});
}
});
// ====== new code =======
resolve(pendingRecord);
});
});
},
Line 556, toEmberData would become something like:
toEmberData: function() {
var _this = this,
record;
return new Ember.RSVP.Promise(function(resolve, reject) {
record = _this.createRecordInStore();
_this.setRelationships(record).then(function(record) {
resolve(record);
});
});
},