KnockoutValidation和条件必需规则

Question

我试图使用条件语句KnockoutValidation.见下面的代码:

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.我想要ConditionalField只有transactionType有价值的要求'Option2'.

使用knockout.validation.js进行条件验证的最佳方法是什么？

Answer 1

我已经解决了.

首先,我犯了错误,transactiontype在我定义之后宣布了conditionalfield.有效的结束代码如下所示:

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

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