观看父控制器形式有效性 [英] Watch form validity from parent controller

问题描述

我有我的控制器内的形式。我希望能够在此基础上表格的有效性的设置范围变量。我已经给了形式的名称已经：

I have a form within my controller. I'd like to be able to set a scope variable based on the validity of this form. I've given the form a name already:

<div ng-controller="myCtrl">

    ...

    <form name='myForm'>
        ...
    </form>

    ...

</div>

和创建该表单的$有效属性$手表（这个位于包含这种形式的控制器）：

And have created a $watch on that form's $valid property (this is located in the controller which contains this form):

$scope.$watch('myForm.$valid', function(oldVal, newVal) {
    console.log("Woo! This might be working!");
    if (newVal) {
        $scope.otherVar = true;
    } else {
        $scope.otherVar = false;
    }
}

我的日志语句只出现在页面加载，而不是形式的有效性发生变化时。 （我已经验证表单的$有效的属性时，可将发生变化：
    

{{myForm会$有效}}

My log statement ONLY appears on page load, but not when the form's validity changes. (I've verified that the form's $valid property is changing by inserting:

{{ myForm.$valid }}

我一直在四处寻找SO，从我已经看到了这个的应的是工作。 （显然，什么是错的，虽然...）

I've been looking around SO and from what I've seen this should be working. (Obviously something is wrong though...)

推荐答案

我觉得你的问题是功能（OLDVAL，的newval）应功能（的newval，OLDVAL）。
除此之外，我无法找到你的code任何过错。
这里有一个工作plunkr例如： http://plnkr.co/edit/ur42HFcVQbpTEBkRBtdY?p= preVIEW

I think your problem is function(oldVal, newVal) should be function(newVal, oldVal). Apart from that I can't find any fault in your code. Here's a working plunkr example: http://plnkr.co/edit/ur42HFcVQbpTEBkRBtdY?p=preview

外，它可能是别的东西在你的code影响的形式，你不必是嵌套在类似的 NG-如果或 NG-视图？

Outside of that it's probably something else in your code affecting the form, you don't have it nested in something like an ng-if or ng-view?

这篇关于观看父控制器形式有效性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！