single table inheritance in ember-data v1.0.0 - ember.js

Question

I'm migrating an ember application from ember-data v0.13 to v1.0.0 .
In version v0.13, RESTSerializer used to have a materialize callback that allowed me to map rails STI models to ember models.
So when I get a list of events with different types, i would convert each of them to the appropriate ember model
"events": [
{
"id": 1,
"type": "cash_inflow_event",
"time": "2012-05-31T00:00:00-03:00",
"value": 30000
},
{
"id": 2,
"type": "asset_bought_event",
"asset_id": 119,
"time": "2012-08-16T00:00:00-03:00",
"quantity": 100
}
]
Ember models
App.Event = DS.Model.extend({...})
App.AssetBoughtEventMixin = Em.Mixin.create({...})
App.AssetBoughtEvent = App.Event.extend(App.AssetBoughtEventMixin)
App.CashInflowEventMixin = Em.Mixin.create({...})
App.CashInflowEvent = App.Event.extend(App.CashInflowEventMixin)
Ember-data code v0.13 that created the STI-like ember models
App.RESTSerializer = DS.RESTSerializer.extend({
materialize:function (record, serialized, prematerialized) {
var type = serialized.type;
if (type) {
var mixin = App.get(type.classify() + 'Mixin');
var klass = App.get(type.classify());
record.constructor = klass;
record.reopen(mixin);
}
this._super(record, serialized, prematerialized);
},
rootForType:function (type) {
if (type.__super__.constructor == DS.Model) {
return this._super(type);
}
else {
return this._super(type.__super__.constructor);
}
}
});
How can I do the same thing in ember-data v1.0.0 ?

Answer 1

I think I've got a solution...
There's a setupData callback on models.
I did the following
App.Event = DS.Model.extend({
...
setupData:function (data, partial) {
var type = data.type;
if (type) {
var mixin = App.get(type.classify() + 'Mixin');
this.reopen(mixin);
}
delete data.type;
this._super(data, partial);
},
eachAttribute: function() {
if(this.get('type')){
var constructor = App.get(this.get('type').classify());
constructor.eachAttribute.apply(constructor, arguments);
}
this._super.apply(this, arguments);
}
});
Ember experts, is this a good idea??

Answer 2

First, since you are using Rails, you may want to use the ActiveModelAdapter & extend your custom serializer from its serializer:
App.ApplicationAdapter = DS.ActiveModelAdapter;
App.ApplicationSerializer = DS.ActiveModelSerializer.extend({...});
It looks like your custom serializer should override typeForRoot & probably normalize. Here is what those methods looks like now:
DS.ActiveModelSerializer#typeForRoot:
typeForRoot: function(root) {
var camelized = Ember.String.camelize(root);
return Ember.String.singularize(camelized);
}
DS.JSONSerializer#normalize:
normalize: function(type, hash) {
if (!hash) { return hash; }
this.applyTransforms(type, hash);
return hash;
}