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angular.module('myModule').directive('numbersOnly', function () {
    return {
        require: 'ngModel',
        link: function (scope, element, attr, ngModelCtrl) {
            function fromUser(text) {
                if (text) {


                    var transformedInput = text.replace(/[^0-9]/g, '');

                    if (attr.max) {
                        transformedInput = text.substr(0, attr.max);
                    }

                    transformedInput = transformedInput.replace(/[^0-9]/g, '');

                    if (transformedInput !== text) {

                        ngModelCtrl.$setViewValue(transformedInput);
                        ngModelCtrl.$render();
                    }


                    return transformedInput;
                }
                return '';
            }
            ngModelCtrl.$parsers.push(fromUser);
        }
    };
})