Angularjs ng-options using number for model does not select initial value

Answer 1

Just to add Christophe's answear: easiest way to achive and maintaint it is to make a directive:

JS:

.directive('convertToNumber', function() {
  return {
    require: 'ngModel',
    link: function(scope, element, attrs, ngModel) {
      ngModel.$parsers.push(function(val) {
        //saves integer to model null as null
        return val == null ? null : parseInt(val, 10);
      });
      ngModel.$formatters.push(function(val) {
        //return string for formatter and null as null
        return val == null ? null : '' + val ;
      });
    }
  };
});

Christophe's answear wont work correctly for '0' as it returns false on "val?" test.