angularjs - Filter in ng-options not working -

i have object maps ids objects. display list of these object , use filter, cannot work. specifically, i'm trying prevent object id 2 appearing in options here's i've got: http://jsfiddle.net/9d2za/

<div ng-app ng-controller="ctrl">     unfiltered:     <select ng-model="selectedbidtype"         ng-options="bidtype.id bidtype.label (bidtypeid, bidtype) in bidtypes">      </select>     <br>     filtered:     <select ng-model="selectedbidtype"         ng-options="bidtype.id bidtype.label (bidtypeid, bidtype) in bidtypes | filter:{id: '!2'}">      </select> </div> 

please note: cannot change structure of bidtypes object in whatever fix come with. here's angularjs:

function ctrl($scope) {     $scope.selectedbidtype = 1;     // bid type objects indexed id fast lookup (this cannot changed in solution)     $scope.bidtypes = {         1: {id: 1, label: "buy"},         2: {id: 2, label: "sell"},         3: {id: 3, label: "missing"}     }; } 

as described documentation, filter filter accepts array first parameter, not object. in such cases, use custom filter make transformation:

mymodule.filter(         'objecttoarray',         [             function ()             {                 return function (object)                 {                     var array = [];                     angular.foreach(object, function (element)                     {                         array.push(element);                     });                      return array;                 };             }         ]     ) ; 

and then, in template:

 <select ng-options="… in bidtypes | objecttoarray | filter:{id:'!2'}">