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 don't need to use elem in order to get the controller, just add it as a param to the link function, and set require to ['ngModel'] in order to get the model ctrl.

 require: ['ngModel'],
 link: function (scope, elem, attrs, ctrl) {

      someObj = {val: '123'};

      scope.check = function () {
        var result = false;
        ctrl.$setValidity(result);
      };

    }

Answer 2

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: '<input type="text" ng-model="someObj.val" ng-change="check()">',
    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');