淘汰赛验证已验证可观察的组错误 [英] Knockout Validation validatedObservable group error

问题描述

我有一组需要整体验证的项目.我在网上论坛上设置了validatedObservable，但是错误消息没有显示.

I have a group of items that I need to validate as a whole. I setup a validatedObservable on the group, but the error message doesn't display.

我这里有一个简化的例子.我希望每个数字都介于0到100之间，且总和恰好是100.如何处理这种验证?

I have a simplified example here. I want each number to be between 0-100 and the sum to be exactly 100. How do I handle this kind of validation?

更新:我知道在此示例中，我可以制作一个ko.computed并进行验证，但这不是我所需要的.

Update: I know in this example I could just make a ko.computed and validate that, but that's not what I need.

示例: http://jsfiddle.net/CGuW2/5/

0-100:<input data-bind="value: num1, valueUpdate: 'afterkeydown'"/><br>
0-100:<input data-bind="value: num2, valueUpdate: 'afterkeydown'"/><br>
<span class="validationMessage" data-bind='text: isValidSum.errors()'></span>

ko.validation.rules['mustEqual'] = {
    validator: function (val, otherVal) {
        return (parseInt(val.num1()) + parseInt(val.num2())) == otherVal;
    },
    message: 'total must equal {0}'
};
ko.validation.registerExtenders();

var viewModel = {
    num1: ko.observable("50").extend({ number: true, min: 0, max: 100 }),
    num2: ko.observable("50").extend({ number: true, min: 0, max: 100 })
};

viewModel.isValidSum = ko.validatedObservable({
                            num1: viewModel.num1,
                            num2: viewModel.num2
                        }).extend({ mustEqual: 100 });

ko.applyBindings(viewModel);

推荐答案

我需要绑定到text: isValidSum.error而不是text: isValidSum.errors().另外，执行此操作时似乎必须绑定visible: !isValidSum.isValid().

I needed to bind on text: isValidSum.error instead of text: isValidSum.errors(). Also, it looks like you have to bind visible: !isValidSum.isValid() when you do this.

所以我的解决方案如下:

So my solution looks like this:

示例: http://jsfiddle.net/CGuW2/6/

0-100:<input data-bind="value: num1, valueUpdate: 'afterkeydown'"/><br>
0-100:<input data-bind="value: num2, valueUpdate: 'afterkeydown'"/><br>
<span class="validationMessage" data-bind='visible: !isValidSum.isValid(), text: isValidSum.error'></span>

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