A couple of options for you besides just manually managing your view model. The mapping plugin supports a create callback that lets you customize how it gets created. This can be used to add default properties to an object, if they happen to be missing. Something like this: http://jsfiddle.net/rniemeyer/WQGVC/ Another alternative is to use a … Read more
I know this is an old thread, but I was having the same problem and found out a much better solution that was probably added to knockout after this question was officially answered, so I’ll just leave it for people with the same problem. Currently there is no need for extenders, custom binding handlers or … Read more
Check this http://jsfiddle.net/pTEbA/268/ Object.prototype.getName = function() { var funcNameRegex = /function (.{1,})\(/; var results = (funcNameRegex).exec((this).constructor.toString()); return (results && results.length > 1) ? results[1] : “”; }; function StateViewModel(data){ this.name = ko.observable(); ko.mapping.fromJS(data, mapping, this); } function CityViewModel(data) { this.name = ko.observable(); ko.mapping.fromJS(data, mapping, this); } function StreetViewModel(data) { this.name = ko.observable(); ko.mapping.fromJS(data, mapping, this); … Read more
Knockout now supports multiple model binding. The ko.applyBindings() method takes an optional parameter – the element and its descendants to which the binding will be activated. For example: ko.applyBindings(myViewModel, document.getElementById(‘someElementId’)) This restricts the activation to the element with ID someElementId and its descendants. See documentation for more details.