仅当对象没有功能和模式验证时才进行敲除验证 [英] Knockout Validation onlyif object no function and pattern validation

问题描述

当标题为空时，我想要 priceMax 是必需的.

I want to the priceMax was required, when title is empty.

我有代码

self.searchParameters = {
    title: ko.observable().extend({
      refreshCountOffers: 500
    }),
    priceMax: ko.observable().extend({
      required: {
        onlyIf: function() {
          return  title==null;
        }
      },
      refreshCountOffers: 500
    })
  };

，但我收到错误标题未定义".

,but I get error 'title is not defined'.

当用户输入第一个字母时，如何禁用显示模式验证错误的选项?

How to disable option, which show error for pattern validation, when user input first letter?

postCode: ko.observable().extend({
  required: true,
  pattern: {
    message: 'Post code is not valid',
    params: '[0-9]{2}-[0-9]{5}'
  },
  refreshCountOffers: 500
})

我的jsfiddle

推荐答案

onlyIf 检查有两个问题:

1. 您需要限定 title 属性
2. title 是可观察的，因此您需要访问该值

1. you need to qualify the title property
2. title is observable so you need to access the value

下面的代码解决了两者:

The code below resolves both:

onlyIf: function() {
    return self.searchParameters.title();
}

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