How to use ko.validation.group function

javascript, jquery, knockout.js, validation

Solution

This worked well for me. Rather than grouping on `this`, create a proxy object that holds the properties you want validated.

this.errors = ko.validation.group({
    P1: this.P1,
    P2: this.P2,
    P3: this.P3
});

If you do this, consider using `validatedObservable` instead of `group`. Not only do you get the errors, but you can collectively check if all the properties are valid using the `isValid` property.

this.validationModel = ko.validatedObservable({
    P1: this.P1,
    P2: this.P2,
    P3: this.P3
});

// is the validationModel valid?
this.validationModel.isValid();
// what are the error messages?
this.validationModel.errors();

Problem

I am trying to use knockout.validation plugin. I created an exampleViewModel : ``` function exampleViewModel() { this.P1 = ko.observable().extend({ required : true }); this.P2 = ko.observable().extend({ required : true }); this.P3 = ko.observable().extend({ required : true }); this.P4 = ko.observable().extend({ required : true }); this.errors = ko.validation.group(this); } ``` In the above view model i created a validation group named errors for the current object. Now if any validation rule fails on any 1 property out of 4 than this errors property contains an error message. `My question is` , if i want to create a validation group of only 3 properties `(P1, P2, P3)` out of 4 than how can i do this ?

Original source