Angular ng-repeat filter with predicate function not works as expected

Question

This is my first time playing with AngularJS, and actually, I'm following the getting-started tutorial. It came to my mind that I would tweak the tutorial scripts to my understandings, by just adding a little that was not in the tutorial.

Basically, the phone object used in the tutorial was:

    {
        "age": 1, 
        "id": "motorola-xoom", 
        "imageUrl": "img/phones/motorola-xoom.0.jpg", 
        "name": "MOTOROLA XOOM™", 
        "snippet": "The Next, Next Generation..."
    }

What I was trying to do was to add an auto populated select box for order the list:

    <select ng-model="orderProp">
        <option ng-repeat="(key, value) in phones[0]" value="{{key}}">
            {{labels[key]}}
        </option>
    </select>

and added a model labels to the controller:

    $scope.labels = {
        "name": "Phone name",
        "snippet": "Description",
        "age": "Newest",
    };

It was working as expected, except that I only wanted to filter the 3 properties above, so I think it would be easy to add a custom predicated function for filtering like this:

    $scope.isPhonePropFilterable = function (propName) {
        console.log('it DOES NOT get here!!!');
        return propName == 'name' || propName != 'snippet' || propName != 'age';
    };

and added this to the ng-repeat

        <option ng-repeat="(key, value) in phones[0] | filter:isPhonePropFilterable" value="{{key}}">

To my suprise, it was not as easy as I thought, my filter function was not called.

See it here: plunker

Did I do anything wrong?

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edited: ng-repeat filter supports filtering array only, not object. The filter function returnes if array param is not an array...

Answer 1

Well, it was my fault. Ng-repeat filter supports array only, it did only mention array in the docs. And checking the filter function, it returned if array param is not an array....