angularjs ngRepeat orderBy when property key has spaces - angularjs

Question

I'm getting some data in JSON format which has spaces in the some of the keys:
[
{
"PlainKey": "SomeValue",
"Spaced Key": "SomeValue"
},
{
"PlainKey": "SomeValue2",
"Spaced Key": "SomeValue2"
}
]
This happens at some point:
$http.get('https://dl.dropboxusercontent.com/u/80497/htmlTesting/properties/credits.properties' + '?callback=JSON_CALLBACK').then(function (data) {
$scope.credits = data.data;
}, function (error) {
$scope.errorOccured = true;
console.log("Error:");
console.log(error);
});
and then ng-repeat is used to display it, with ordering:
<select ng-model="corder">
<option value="PlainKey">Plain Key</option>
<option value="Spaced Key">Spaced Key</option>
</select>
<li ng-repeat="credit in credits | orderBy:corder" >
.....
</li>
This doesn't work ( I get an exception )
(The PlainKey works because there are no spaces).
I also tried putting the values in ':
<select ng-model="corder">
<option value="'PlainKey'">Plain Key</option>
<option value="'Spaced Key'">Spaced Key</option>
</select>
This seems to change the order, but not correctly.
What Am I missing?
Thanks!

Answer 1

Simplest way, just surround a field name with UTF8 code for quotation mark:
HTML
<li ng-repeat="item in items | orderBy:'\u0022Spaced Key\u0022'">
JS
$scope.orderKey = '\u0022Spaced Key\u0022';

Answer 2

Comments appeared to help so I'm including it as an answer:
One way to sort items with spaces in their object property names is to pass a predicate sort function into orderBy instead of specifying the object property name. The relevant modifications in particular:
HTML:
<li ng-repeat="credit in credits | orderBy:predicate">
JS:
$scope.predicate = function(val) {
// $scope.corder corresponds to the object property name to sort by
return val[$scope.corder];
}
Demonstration Plunker.