Angular’s documentation for the ng-select
directive explains how to solve this problem. See https://code.angularjs.org/1.4.7/docs/api/ng/directive/select (last section).
You can create a convert-to-number
directive and apply it to your select tag:
JS:
module.directive('convertToNumber', function() {
return {
require: 'ngModel',
link: function(scope, element, attrs, ngModel) {
ngModel.$parsers.push(function(val) {
return val != null ? parseInt(val, 10) : null;
});
ngModel.$formatters.push(function(val) {
return val != null ? '' + val : null;
});
}
};
});
HTML:
<select ng-model="model.id" convert-to-number>
<option value="0">Zero</option>
<option value="1">One</option>
<option value="2">Two</option>
</select>
Note: I found the directive from the doc does not handle nulls so I had to tweak it a little.