[kobloff]

Не взлетает.

MyApp.directive('MyDirective', ['$filter', function(){
    return {
        restrict: 'A',
        require: 'ngModel',
        link: function($scope, element, attrs, ngModel, $filter){
            ngModel.$formatters.push(function(text){
                return $filter('MyFilter')(text);
            });
        }
    }
}]);

Object is not a function.