TypeError:无法读取null的属性"0" [英] TypeError: Cannot read property '0' of null
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问题描述
我正在研究一个使用Sails.js作为框架的NodeJS项目.
I'm working on a NodeJS Project that uses Sails.js as a framework.
我要完成的是一个权限系统，其中每个组的权限由复选框设置，我在AngularJS中使用典型形式.
What I'm trying to accomplish is a permissions system where the permissions per group are set by Check Boxes, I'm using a typical form with AngularJS.
当我单击"Sumbit"按钮时，它会在浏览器的控制台上引发此错误:
When I click my "Sumbit" button it throws this error at my Browser's console:
angular.1.3.js:11594 TypeError: Cannot read property '0' of null
at $parseFunctionCall (angular.1.3.js:12333)
at callback (angular.1.3.js:22949)
at Scope.$eval (angular.1.3.js:14383)
at Scope.$apply (angular.1.3.js:14482)
at HTMLFormElement.<anonymous> (angular.1.3.js:22954)
at HTMLFormElement.eventHandler (angular.1.3.js:3011)(anonymous function) @ angular.1.3.js:11594
任何帮助，将不胜感激.
Any help with this would be greatly appreciated.
编辑忘记密码:
这是接收从
EDIT Forgot the Code:
Here is the code that receives the information POSTed from the form
createGroup: function(req, res) {
Groups.create({
groupName: req.param('groupName'),
canViewUsers: req.param('canViewUsers'),
canEditUsers: req.param('canEditUsers'),
canPromoteToStaff: req.param('canPromoteToStaff'),
canViewNotes: req.param('canViewNotes'),
canEditPermissions: req.param('canEditPermissions')
});
以下是用于捕获信息并将其发布到create函数的代码
Here is the code for that catches the information and POSTs it to the create function
angular.module('GroupsModule').controller('GroupsController', ['$scope', '$http', 'toastr', function($scope, $http, toastr) {
$scope.createGroup = {
loading: false
};
$scope.createGroupForm = function(){
// Set the loading state (i.e. show loading spinner)
$scope.createGroup.loading = true;
// Submit request to Sails.
$http.post('/createGroup', {
groupName: $scope.createGroupForm.groupName,
canViewUsers: $scope.createGroupForm.canViewUsers,
canEditUsers: $scope.createGroupForm.canEditUsers,
canPromoteToStaff: $scope.createGroupForm.canPromoteToStaff,
canViewNotes: $scope.createGroupForm.canViewNotes,
canEditPermissions: $scope.createGroupForm.canEditPermissions
})
.then(function onSuccess(sailsResponse){
window.location = '/groups';
})
.catch(function onError(sailsResponse){
// Handle known error type(s).
// If using sails-disk adpater -- Handle Duplicate Key
var groupAlreadyExists = sailsResponse.status == 409;
if (groupAlreadyExists) {
toastr.error('That group already exists', 'Error');
}
})
.finally(function eitherWay(){
$scope.createGroup.loading = false;
})
有右括号，但帖子中的格式未正确设置.
There are closing brackets but they aren't getting formatted correctly in the post.
最后是表单本身的代码:
And finally here is the code for the Form itself:
<!--STYLES-->
<link rel="stylesheet" href="/styles/angular-toastr.css">
<link rel="stylesheet" href="/styles/bootstrap.3.1.1.css">
<link rel="stylesheet" href="/styles/importer.css">
<link rel="stylesheet" href="/styles/style.css">
<link rel="stylesheet" href="/styles/theme.css">
<link rel="stylesheet" href="/styles/theme.min.css">
<!--STYLES END-->
<body ng-app="DashboardModule" ng-controller="DashboardController" ng-cloak>
<div class="bs-docs-section clearfix">
<div class="row">
<div class="bs-component">
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/">Insomnia eSports</a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li><a href="/groups"><i class="fa fa-users" aria-hidden="true"></i> Group Management </a></li>
</ul>
<!--
<form class="navbar-form navbar-left" role="search">
<div class="form-group">
<input type="text" class="form-control" placeholder="Search">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
-->
<ul class="nav navbar-nav navbar-right">
<li><a href="/logout">Sign Out</a></li>
</ul>
</div>
</div>
</nav>
</div>
</div>
</div>
<form ng-submit="createGroupForm()" id="create-group-form" class="form-signin" name="createGroupForm">
<h2 class="form-signin-heading">Create an account</h2>
<div class="row">
<!-- Group Name -->
<label>Group Name</label>
<input type="text" class="form-control" placeholder="Group Name" name="groupName" ng-model="createGroupForm.name" ng-maxlength="25" required>
</div>
<!-- Can View Users -->
<label>View Users?</label>
<input type="checkbox" name="canViewUsers" ng-model="canViewUsers.value">
<!-- Can View Users -->
<label>Edit Users?</label>
<input type="checkbox" name="canEditUsers" ng-model="canEditUsers.value">
<!-- Can Promote To Staff -->
<label>Promote to Staff?</label>
<input type="checkbox" name="canPromoteToStaff" ng-model="canPromoteToStaff.value">
<!-- Can Promote To Staff -->
<label>Can view notes?</label>
<input type="checkbox" name="canViewNotes" ng-model="canViewNotes.value">
<!-- Can Promote To Staff -->
<label>Can edit permissions?</label>
<input type="checkbox" name="canEditPermissions" ng-model="canEditPermissions.value">
<br/>
<!-- Disable signup button until the form has no errors -->
<button class="btn btn-success btn-lg btn-block" type="submit" ng-disabled="createGroupForm.$invalid">
<span ng-show="!createGroupForm.loading">Create Group</span>
<span class="overlord-loading-spinner fa fa-spinner" ng-show="createGroupForm.loading" ></span>
<span ng-show="createGroupForm.loading">Preparing your new group...</span>
</button>
<input type="hidden" name="_csrf" value="<%= _csrf %>" />
</form>
<!--SCRIPTS-->
<script src="/js/dependencies/sails.io.js"></script>
<script src="/js/dependencies/angular.1.3.js"></script>
<script src="/js/dependencies/Base64.js"></script>
<script src="/js/dependencies/angular-toastr.js"></script>
<script src="/js/dependencies/compareTo.module.js"></script>
<script src="/js/public/signup/SignupModule.js"></script>
<script src="/js/public/groups/GroupsModule.js"></script>
<script src="/js/private/dashboard/DashboardModule.js"></script>
<script src="/js/public/homepage/HomepageModule.js"></script>
<script src="/js/private/dashboard/DashboardController.js"></script>
<script src="/js/public/groups/GroupsController.js"></script>
<script src="/js/public/homepage/HomepageController.js"></script>
<script src="/js/public/signup/SignupController.js"></script>
<!--SCRIPTS END-->
</body>
推荐答案
这是我不正确地在createGroupForm上使用$ scope而不是在createGroup上解决的.更正后的代码位如下:
This was solved by me incorrectly using $scope on createGroupForm instead of just createGroup. The corrected code bit is below:
代替:
$scope.createGroupForm.canViewUsers
使用:
$scope.createGroup.canViewUsers
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