KnockoutValidation和条件必需规则 [英] KnockoutValidation and the conditional required rule

问题描述

我正在尝试使用条件语句 KnockoutValidation 。请参阅以下代码：

I am trying to use KnockoutValidation with conditional statements. See code below:

self.transactionType = ko.observable('Option1');

self.ConditionalField = ko.observable().extend({
  required: true, 
  onlyIf: self.transactionType = ="Option2"
});

不幸的是，这不起作用。我希望只有 transactionType 的值'Option2'。

Unfortunately this doesn't work. I want to have ConditionalField only required if transactionType has value 'Option2'.

使用knockout.validation.js条件验证的最佳方法是什么？

What is the best way to use conditional validation with knockout.validation.js?

推荐答案

我已经解决了。

首先，在我定义了后，我错误地宣布 transactiontype conditionalfield 。有效的结束代码如下所示：

First of all I made the mistake of declaring the transactiontype after I had defined the conditionalfield. The end code that works looks like this:

self.transactionType = ko.observable("Option1");

self.conditionalField = ko.observable().extend({
  required: {
    onlyIf: function () { 
      return self.transactionType () == "Option2";
    }
  }
});

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