Knockout Validation disable validation

knockout-validation, knockout.js

Solution

Update Old answer not valid for the Knockout-Contrib version of Validation (Thats the branch with active development)

https://github.com/Knockout-Contrib/Knockout-Validation

Use the onlyIf option like

this.enable = ko.observable(true);
this.required = ko.observable().extend({ required: { onlyIf: this.enable } });

Old answer

Try

this.property.extend({ validatable: false }); // disables all validation for property

or

this.property.extend({ required: false }); // disables required validation for property

Problem

I have ko.observableArrays with validation on the items. The user can mark a item as deleted. When it is marked as deleted, I need to disable validation on that item. How do you dynamically disable validation? Example: http://jsfiddle.net/3RZjT/2/ ``` <div data-bind="foreach: names"> <input data-bind="value: name, valueUpdate: 'afterkeydown'" /> <a data-bind="click: deleteMe, text:deleted()?'undelete':'delete'" href="#">delete</a><br/> </div> function Person(name){ var self = this; self.name = ko.observable(name).extend({ required: true}); self.deleted = ko.observable(false); self.deleteMe = function(){ self.deleted(!self.deleted()); self.deleted.extend({ validatable: !self.deleted()}); }; } var viewModel = { names: ko.observableArray([new Person("Ken"), new Person("")]) }; ko.applyBindings(viewModel); ```

Original source