Skip nested forms validation with AngularJS

Question

How can I skip validation of nested forms with AngularJS? I have to make an outer form valid even when its child form is invalid.

In the example below outer form sh

Answer 1

At least with Angular 1.5 it seems to be enough to remove the nested form from the parent using $removeControl:

module.directive('isolateForm', function() {
  return {
    restrict: 'A',
    require: '?form',
    link: function(scope, element, attrs, formController) {
      if (!formController) {
        return;
      }

      var parentForm = formController.$$parentForm; // Note this uses private API
      if (!parentForm) {
        return;
      }

      // Remove this form from parent controller
      parentForm.$removeControl(formController);
    }
  };
});

Et voila, pristine and validity states of the parent are no longer affected by the nested form.