AngularJS sorting by property

AngularJS’ orderBy filter does just support arrays – no objects. So you have to write an own small filter, which does the sorting for you.

Or change the format of data you handle with (if you have influence on that). An array containing objects is sortable by native orderBy filter.

Here is my orderObjectBy filter for AngularJS:

app.filter('orderObjectBy', function(){
 return function(input, attribute) {
    if (!angular.isObject(input)) return input;

    var array = [];
    for(var objectKey in input) {
        array.push(input[objectKey]);
    }

    array.sort(function(a, b){
        a = parseInt(a[attribute]);
        b = parseInt(b[attribute]);
        return a - b;
    });
    return array;
 }
});

Usage in your view:

<div class="item" ng-repeat="item in items | orderObjectBy:'position'">
    //...
</div>

The object needs in this example a position attribute, but you have the flexibility to use any attribute in objects (containing an integer), just by definition in view.

Example JSON:

{
    "123": {"name": "Test B", "position": "2"},
    "456": {"name": "Test A", "position": "1"}
}

Here is a fiddle which shows you the usage:
http://jsfiddle.net/4tkj8/1/