CODEWITHSUNDEEP
angularjsangularjs-directiveangular-ui-datepicker
arielkuzminski
arielkuzminski

Reputation: 63

How to set input field validation in reusable custom directive?

I'm trying to make a reusable custom directive that will validate date in input field. Code provided below is working, however is not reusable at all which is my biggest concern. What I was trying to do, was to set a new scope in directive however I got an error:

Multiple directives requesting isolated scope.

So I guess isolated scope is not going to help me.

Any other solutions?

That's my first template:

<form ng-submit="add()" name="addTask" class="form-horizontal">
  <input name="dateInput" is-date-valid type="text" class="form-control" ng-model="task.DueDate" datepicker-options="datepicker.options" ng-model-options="{ timezone: 'UTC' }" uib-datepicker-popup="mediumDate" is-open="isOpened" required>
</form>

That's my second template:

<form ng-submit="edit()" name="editTask" class="form-horizontal">
  <input name="dateInput" is-date-valid type="text" class="form-control" ng-model="task.DueDate" datepicker-options="datepicker.options" ng-model-options="{ timezone: 'UTC' }" uib-datepicker-popup="mediumDate" is-open="isOpened" required>
</form>

And that's my custom directive:

function isDateValid($log) {
  'ngInject';
  var directive = {
    restrict: 'A',
    require: 'ngModel',
    link: link
  };
  return directive;

  function link(scope, element, attrs, ctrl) {

    scope.$watch(attrs.ngModel, function () {
      var validation = can_i_get_this_from_controller ?

        if (validation) {
          ctrl.$setValidity('validation', true);
        } else {
          ctrl.$setValidity('validation', false);
        }
    });
  }
}

module.exports = isDateValid;

Upvotes: 0

Views: 827

Answers (1)

madhur
madhur

Reputation: 1001

The way you implemented the custom validator is not good, you should be doing something like this -

.directive('dateValidate', function () {
    return {
        restrict: 'A',
        require: 'ngModel',
        link: function (scope, elem, attrs, ngModel) {
           ngModel.$validators.dateValidate = function(modelValue) {  
               //Your logic here, return true if success else false
           }
        }
    };
 });

It can be used on both form paths, so no need of that logic here. To know more about these this is one good resource

Upvotes: 1

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