Cannot read property '$valid' of undefined - angularjs

Question

I have a form with a name field and two validations - required and max-length.
When I enter correct value, the form in controller is showing valid and returning true. But on entering wrong data, $valid is not throwing false and simply says -
Cannot read property '$valid' of undefined
Why is the form getting undefined in this case?
Jsfiddle here
Thanks in advance

Answer 1

Add ng-submit attribute to the form:
<form name="myForm" ng-submit="SaveAndNext()" novalidate>
Change controller to:
function myCtrl($scope, $log){
$scope.data = {};
$scope.SaveAndNext = function(){
if($scope.myForm.$valid){
$log.info('Form is valid');
$log.info($scope.data);
} else {
$log.error('Form is not valid');
}
}
}
Remove ng-click event handler from your submit button
Updated fiddle: http://jsfiddle.net/9cgopo7d/1/
I included the $log service because it's a useful default service and you might not know about it.

Answer 2

See demo below pass your form to controller with the submit click
ng-click="SaveAndNext(myForm)"
and now you can easy access all your form properties
function myCtrl($scope) {
$scope.SaveAndNext = function(form) {
console.log(form);
if (form.$valid) {
alert(form.$valid);
} else {
alert("!" + form.$valid)
}
}
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div class="registrationdetails" ng-app="" ng-controller="myCtrl">
<form name="myForm" novalidate>
<div class="list">
<div class="item list-item">
<div class="row row-center">
<div class="col-50"> <span class="form-field-name">Name</span>
</div>
<div class="col-50">
<textarea type="text" rows="5" ng-model="data.Name" name="Name" ng-maxlength=45 required></textarea> <span ng-show="myForm.Name.$dirty && myForm.Name.$invalid">
<span class="form-error" ng-show="myForm.Name.$error.required">Name is required</span>
<span class="form-error" ng-show="myForm.Name.$error.maxlength">Name should be max 45 characters</span>
</span>
</div>
</div>
</div>
<div class="item list-item">
<div class="row row-center">
<div class="col-50"> <span class="form-field-name">Type</span>
</div>
<div class="col-50">
<select ng-class="{defaultoption: !data.Type}" ng-model="data.Type" name="Type" required>
<option value="" disabled selected class="defaultoption">Type</option>
<option value="1" class="actualoption">Type 1</option>
<option value="2" class="actualoption">Type 2</option>
</select>
<span ng-show="myForm.Type.$dirty && myForm.Type.$invalid">
<span class="form-error" ng-show="myForm.Type.$error.required">Type is required</span>
</span>
</div>
</div>
</div>
<div class="item list-item">
<div class="row">
<div class="col">
<input type="submit" class="button" ng-click="SaveAndNext(myForm)" value="Next">
</div>
</div>
</div>
</div>
</form>
</div>

Answer 3

Place $scope.data={}; at the top of controller:-)
This is happening becuase you are directly submit the form which doesn't yet initialized the data object and therefore name data.Name is not recognized.
And if you place $scope.data={} in that case we have empty data object initialized.So in second case we have atleast reference of empty object whereas in first case it doesn't have any reference.
Fiddle

Answer 4

HTML:
<form name="form" id='form' novalidate>
<input type="text"required name="Title" ng-model="Title">
<div ng-messages="form.Title.$error">
<div ng-message="required">Field Required</div>
</div>
</form>
JS:
$scope.save= function(){
if (!scope.createMessage.$valid) {
scope.form.$submitted = true;
return;
}
The format for using $valid should be like this. If you don't get again then visit the official site of AngularJs.

Answer 5

I had similar problem, but in my case I was a ng-if creating a child scope that did not have the form defined.
Just changed the ng-if to ng-show and the form stop be undefined.