AngularJS check if form is valid in controller
AngularjsAngularjs Problem Overview
I need to check if a form is valid in a controller.
View:
<form novalidate=""
name="createBusinessForm"
ng-submit="setBusinessInformation()"
class="css-form">
<!-- fields -->
</form>
In my controller:
.controller(
'BusinessCtrl',
function ($scope, $http, $location, Business, BusinessService,
UserService, Photo)
{
if ($scope.createBusinessForm.$valid) {
$scope.informationStatus = true;
}
...
I'm getting this error:
TypeError: Cannot read property '$valid' of undefined
Angularjs Solutions
Solution 1 - Angularjs
Try this
in view:
<form name="formName" ng-submit="submitForm(formName)">
<!-- fields -->
</form>
in controller:
$scope.submitForm = function(form){
if(form.$valid) {
// Code here if valid
}
};
or
in view:
<form name="formName" ng-submit="submitForm(formName.$valid)">
<!-- fields -->
</form>
in controller:
$scope.submitForm = function(formValid){
if(formValid) {
// Code here if valid
}
};
Solution 2 - Angularjs
I have updated the controller to:
.controller('BusinessCtrl',
function ($scope, $http, $location, Business, BusinessService, UserService, Photo) {
$scope.$watch('createBusinessForm.$valid', function(newVal) {
//$scope.valid = newVal;
$scope.informationStatus = true;
});
...
Solution 3 - Angularjs
Here is another solution
Set a hidden scope variable in your html then you can use it from your controller:
<span style="display:none" >{{ formValid = myForm.$valid}}</span>
Here is the full working example:
angular.module('App', [])
.controller('myController', function($scope) {
$scope.userType = 'guest';
$scope.formValid = false;
console.info('Ctrl init, no form.');
$scope.$watch('myForm', function() {
console.info('myForm watch');
console.log($scope.formValid);
});
$scope.isFormValid = function() {
//test the new scope variable
console.log('form valid?: ', $scope.formValid);
};
});
<!doctype html>
<html ng-app="App">
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.1/angular.min.js"></script>
</head>
<body>
<form name="myForm" ng-controller="myController">
userType: <input name="input" ng-model="userType" required>
<span class="error" ng-show="myForm.input.$error.required">Required!</span><br>
<tt>userType = {{userType}}</tt><br>
<tt>myForm.input.$valid = {{myForm.input.$valid}}</tt><br>
<tt>myForm.input.$error = {{myForm.input.$error}}</tt><br>
<tt>myForm.$valid = {{myForm.$valid}}</tt><br>
<tt>myForm.$error.required = {{!!myForm.$error.required}}</tt><br>
/*-- Hidden Variable formValid to use in your controller --*/
<span style="display:none" >{{ formValid = myForm.$valid}}</span>
<br/>
<button ng-click="isFormValid()">Check Valid</button>
</form>
</body>
</html>
Solution 4 - Angularjs
The BusinessCtrl is initialised before the createBusinessForm's FormController.
Even if you have the ngController on the form won't work the way you wanted.
You can't help this (you can create your ngControllerDirective, and try to trick the priority.) this is how angularjs works.
See this plnkr for example: http://plnkr.co/edit/WYyu3raWQHkJ7XQzpDtY?p=preview