AngularJS 'controller as' and form.$valid

Question

I want to check if a form is valid inside an angular controller. This seems straightforward when using $scope, but I can't get it to work with the 'controller as' syntax.

When I attempt to access form.$valid I get the error message "Cannot read property '$valid' of undefined".

plunkr: http://plnkr.co/edit/w54i1bZVD8UMhxB4L2JX?p=preview

HTML

<div ng-app="demoControllerAs" ng-controller="MainController as main">
  <form name="contactForm" novalidate>
    <p>
      <label>Email</label>
      <input type="email" name="email" ng-model="main.email" required />
    </p>
    <p>
      <label>Message</label>
      <textarea name="message" ng-model="main.message" required></textarea>
    </p>
    <input type="submit" value="submit" ng-click="main.submit()" />
  </form>
</div>

JS

var app = angular.module('demoControllerAs', []);

app.controller('MainController', [function () {
    var main = this;

    main.submit = function () {
        var isValid = main.contactForm.$valid;
        console.log(isValid);
    };
}]);

Mikko Viitala · Accepted Answer · 2015-05-05 10:14:03Z

11

You could do as @ons-jjss suggested but if you prefer not to inject $scope into you controller, then just change your form name as

<form name="main.contactForm" novalidate>

and it'll work like a charm.

answered May 5, 2015 at 10:14

Mikko Viitala

8,4044 gold badges42 silver badges62 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

ismailarilik Over a year ago

This solution is not intuitive. You are already using $scope in template. You should inject $scope to controller instead of prefixing a form name with weird names such as "main", "$ctrl" or "$vm".

Sanjeev Singh Over a year ago

Yes.. you got it.

Mikko Viitala Over a year ago

@ismailarilik what's intuitive is matter of perspective, maybe? stackoverflow.com/a/30644370/1061668

Sanjeev Singh · Accepted Answer · 2015-05-05 12:24:34Z

4

You need to use in this way: $scope.contactForm.$valid

EDIT

To work the above syntax, $scope needs to be inhjected in controller.

app.controller('MainController', function($scope) { 
  //code 
}

edited May 5, 2015 at 12:24

answered May 5, 2015 at 10:06

Sanjeev Singh

4,0963 gold badges36 silver badges39 bronze badges

2 Comments

ChaoticNadirs Over a year ago

Doesn't work. $scope is not defined. plnkr.co/edit/HIwmTvLs0wg6Kt7244vM?p=preview

Sanjeev Singh Over a year ago

I guess you did not inject $scope. app.controller('MainController', function($scope) { //code }

Pritam · Accepted Answer · 2015-05-05 10:33:27Z

0

You need to use main.contactForm in form name attribute then it's solved. See this

`http://plnkr.co/edit/us8MKU3LZ7pnLV66xIrv?p=preview`

answered May 5, 2015 at 10:33

Pritam

162 bronze badges

Comments

Alhuck · Accepted Answer · 2015-05-05 10:14:05Z

-1

You can pass your form as a parameter to function submit as ng-click="main.submit(contactForm)

and then validate it in controller method

answered May 5, 2015 at 10:14

Alhuck

1,0298 silver badges11 bronze badges

Collectives™ on Stack Overflow

AngularJS 'controller as' and form.$valid

4 Answers 4

3 Comments

2 Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

3 Comments

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related