Javascript 两个相互依赖字段的剔除验证
考虑以下代码:Javascript 两个相互依赖字段的剔除验证,javascript,knockout.js,knockout-validation,Javascript,Knockout.js,Knockout Validation,考虑以下代码: var MyObjectModel = function(myObject){ var self = this; self.myNumber1 = ko.observable(myObject.number1).trimmed(); self.myNumber2 = ko.observable(myObject.number2).trimmed(); 我想扩展myNumber1和myNumber2,添加敲除验证,这样,如果两者都为空,它就会抛出一个错误,如果其中任何一个都有值,
var MyObjectModel = function(myObject){
var self = this;
self.myNumber1 = ko.observable(myObject.number1).trimmed();
self.myNumber2 = ko.observable(myObject.number2).trimmed();
我想扩展myNumber1和myNumber2,添加敲除验证,这样,如果两者都为空,它就会抛出一个错误,如果其中任何一个都有值,它就会保持正常
你知道我怎样才能做到这一点吗?你可以使用一个ko.computed来创建一个函数,该函数检查是否至少设置了这两个字段中的任何一个,并且只有在验证过程中才有条件地执行验证
var MyObjectModel = function (myObject) {
var self = this;
self.myNumber1 = ko.observable(myObject.number1);
self.myNumber2 = ko.observable(myObject.number2);
self.numbersHaveNoValue = ko.computed(function () {
var value1 = self.myNumber1(), value2 = self.myNumber2();
return !ko.validation.rules.required.validator(value1, true) &&
!ko.validation.rules.required.validator(value2, true);
});
self.myNumber1.extend({ required: { onlyIf: self.numbersHaveNoValue }});
self.myNumber2.extend({ required: { onlyIf: self.numbersHaveNoValue }});
}
我创建了一个提琴:我希望这能帮助我解决当前的问题,但提琴似乎丢失了我不确定,但我想使用
…required.validator(value1,true)
对myNumber1
和myNumber2
都有错误validation@AndreasNiedermair固定:)
var MyObjectModel = function(myObject) {
var self = this;
self.myNumber1 = ko.observable(myObject.number1).trimmed();
self.myNumber2 = ko.observable(myObject.number2).trimmed();
self.numberCount = ko.computed(function() {
var count = 0;
count += self.myNumber1() != '' ? 1 : 0;
count += self.myNumber2() != '' ? 1 : 0;
return count;
}).extend({min:1});
}