Ember-data multi-word model fields not serialized properly - serialization

Question

I'm seeing some odd behavior with some custom serializer code that I wrote.
I have a field in an Asset model called 'marketName'. My Rails backend expects this field to be called 'market_name'. I've extended the ActiveModelSerializer and have overridden the 'extractSingle' and 'serialize' methods.
The odd thing is this - for all the other fields in my Asset model that are not made up of multiple words - the serialization code that I've written works great. No issues. However - for any field containing multiple words - the serialization doesn't work completely, in that while it saves the Asset when created - it doesn't correctly populate the Asset model's 'marketName' field (and any other field that is made up of multiple words).
For example if I examine the 'marketName' field in the data inspector it appears as '{}'. If I change the name of any multi word field in my Asset model to be singular (aka change 'marketName' to 'name') and update the serialization code accordingly - everthing works great.
Any idea what's going on ?
Thanks
Dave

Answer 1

In the test of extractSingle() that the core team (see line 126, also show below incase link goes bad for future readers) did, they pass in the variables as super_villains, then later the normalize() included in ActiveModelSerializer changes it for them to superVillains.
So I think in your extractSingle assume the values are not yet camelCase, but still are still in underscore_format (e.g., "market_name"), and you should be golden!
test("extractSingle", function() {
env.container.register('adapter:superVillain', DS.ActiveModelAdapter);
var json_hash = {
home_planet: {id: "1", name: "Umber", super_villain_ids: [1]},
super_villains: [{
id: "1",
first_name: "Tom",
last_name: "Dale",
home_planet_id: "1"
}]
};
var json = env.amsSerializer.extractSingle(env.store, HomePlanet, json_hash);
deepEqual(json, {
"id": "1",
"name": "Umber",
"superVillains": [1]
});
env.store.find("superVillain", 1).then(async(function(minion){
equal(minion.get('firstName'), "Tom");
}));
});