How to set validity in directive (angularjs)

Question

Is there a way to set an input validity inside a directive? The input present in the directive\'s template.

Lets say I have template:

Answer 1

You need to retrieve NgModelController instance associated with the input. Then you call $setValidity on this object specifying validation key (required, minlength, customkey, etc.). It will look like this:

.directive('myDir', function() {
  return {
    restrict: 'E',
    template: '',
    link: function(scope, element) {

      var modelController = element.find('input').controller('ngModel');

      someObj = {
        val: '123'
      };

      scope.check = function() {
        var result = false;
        modelController.$setValidity('myrequired', result);
      };

    }
  }
})

The most important part here is how to get NgModelController. Below line of code is taking care of it:

var modelController = element.find('input').controller('ngModel');