我需要检查一个表单在控制器中是否有效。
查看:
<form novalidate=""
name="createBusinessForm"
ng-submit="setBusinessInformation()"
class="css-form">
<!-- fields -->
</form>
在我的控制器中:
.controller(
'BusinessCtrl',
function ($scope, $http, $location, Business, BusinessService,
UserService, Photo)
{
if ($scope.createBusinessForm.$valid) {
$scope.informationStatus = true;
}
...
我收到了这个错误:
TypeError: Cannot read property '$valid' of undefined
答案 0 :(得分:106)
试试这个
在视图中:
<form name="formName" ng-submit="submitForm(formName)">
<!-- fields -->
</form>
控制器中的:
$scope.submitForm = function(form){
if(form.$valid) {
// Code here if valid
}
};
或
在视图中:
<form name="formName" ng-submit="submitForm(formName.$valid)">
<!-- fields -->
</form>
控制器中的:
$scope.submitForm = function(formValid){
if(formValid) {
// Code here if valid
}
};
答案 1 :(得分:29)
我已将控制器更新为:
.controller('BusinessCtrl',
function ($scope, $http, $location, Business, BusinessService, UserService, Photo) {
$scope.$watch('createBusinessForm.$valid', function(newVal) {
//$scope.valid = newVal;
$scope.informationStatus = true;
});
...
答案 2 :(得分:14)
这是另一种解决方案
在html中设置隐藏的范围变量,然后您可以从控制器中使用它:
<span style="display:none" >{{ formValid = myForm.$valid}}</span>
以下是完整的工作示例:
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?: ', $scope.formValid);
};
});
&#13;
<!doctype html>
<html ng-app="App">
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.1/angular.min.js"></script>
</head>
<body>
<form name="myForm" ng-controller="myController">
userType: <input name="input" ng-model="userType" required>
<span class="error" ng-show="myForm.input.$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>
&#13;
答案 3 :(得分:4)
BusinessCtrl
在createBusinessForm
FormController
之前初始化。
即使您在表单上有ngController
也不会按照您想要的方式运行。
你无法帮助(你可以创建你的ngControllerDirective
,并尝试欺骗优先级。)这就是angularjs的工作方式。
请参阅此plnkr示例: http://plnkr.co/edit/WYyu3raWQHkJ7XQzpDtY?p=preview