Ember V1.0.0-pre.2: capitalization in handlebars templates - ember.js

Question

We are using Ember V1.0.0-pre.2 and our handlebars is as follows:
{{#each data.Product}}
<div>
{{Details.uid}} - {{Details.Name}}
</div>
{{/each}}
Our the 'data' bit is from this json:
{
"Product": [
{
"Details": {
"uid": "1",
"Name": "one"
}
},
{
"Details": {
"uid": "2",
"Name": "two"
}
},
{
"Details": {
"uid": "3",
"Name": "three"
}
},
{
"Details": {
"uid": "4",
"Name": "four"
}
},
{
"Details": {
"uid": "5",
"Name": "five"
}
}
]
}
This fails with the following warning:
WARNING: Watching an undefined global, Ember expects watched globals to be setup by the time the run loop is flushed, check for typos
When I change Details.whatever to details.whatever the warning disappears.
Is this by design or can we get around it somehow? The data is returned from the server in a fixed format and we wouldn't want to use another interim model if we can avoid it.

Answer 1

Ember has a naming policy where "instances/attributes" always start with a lowercase letter whilst "classes" always start with an uppercase letter. I think that's probably where you are running into some issues, if possible you should be de-serialising your JSON into attributes starting with lowercase letters.
Relevant part pulled from the guides (http://emberjs.com/guides/object-model/classes-and-instances/):
By convention, properties or variables that hold classes are capitalized, while instances are not. So, for example, the variable Person would contain a class, while person would contain an instance (usually of the Person class). You should stick to these naming conventions in your Ember applications.

Answer 2

Naming convention apply also to model data, but if you can't change what is coming from your API you can get around this by defining a map on a per property basis, e.g.
App.Adapter.map('App.Product', {
details: {key: 'Details'},
name: {key: 'Name'},
fooBar: {key: 'FOO_BaR'}
...
});
see here for more reference on how to map your json to your models: https://github.com/emberjs/data/blob/master/packages/ember-data/lib/system/mixins/mappable.js
hope it helps