使用虚拟机不能绑定到范围。表示法控制器/ HTML [英] Can't bind to scope using vm. notation in controller/html
问题描述
我使用的路由参数,以获得我所需要的物品的ID建立一个更新的形式。这是工作的打算。具有更新表单的一部分是检索存储的值,并将其绑定到表单。
I am building an update form using a route parameter to get the ID of the item I need. This is working as intended. Part of having the update form is to retrieve stored values and bind them to the form.
如果我有我的模式设置是这样的:
If I have my model set to something like this:
<input type="text" class="form-control" id="Event_Desc" data-ng-model="eventdescription" required />
和我的控制器设置如下(注意,正在调用使用NG-资源REST服务)。
And my controller is set as follows (note, that is calling a REST service using ng-resource).
appItem.get({
Id: $routeParams.Id
}, function (result) {
$scope.eventdescription = result.Title;
});
它将适当设定的域值存储在表格上的数据库中的值。但是,如果我尝试使用虚拟机。注释如下,则返回无法设置未定义或为空引用属性'eventdescription'的错误
It will properly set the field value to the value stored in the database on the form. However, if I attempt to use vm. notation as follows, it returns an error of "Unable to set property 'eventdescription' of undefined or null reference"
HTML
<input type="text" class="form-control" id="Event_Desc" data-ng-model="vm.eventdescription" required />
控制器:
appItem.get({
Id: $routeParams.Id
}, function (result) {
$scope.vm.eventdescription = result.Title;
});
我为什么不能设置vm.eventdescription的$范围?
Why can't I set the $scope of vm.eventdescription?
推荐答案
尝试使用它像在此之前实例化虚拟机
try to instantiate vm before use it like this
$scope.vm = {};
appItem.get({
Id: $routeParams.Id
}, function (result) {
$scope.vm.eventdescription = result.Title;
});
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