Knockout serialization with ko.toJSON - how to ignore properties that are null

Question

When using:

var dataToSave = ko.toJSON(myViewModel);

.. is it possible to not serialize values that are null?

Seri

Answer 1

You can add a toJSON method to your view model and use that to remove all the unneeded properties:

 ViewModel.prototype.toJSON = function() {
     var copy = ko.toJS(this);
     // remove any unneeded properties
     if (copy.unneedProperty == null) {
         delete copy.unneedProperty;
     }
     return copy;
 }

You could probably automate it to run through all your properties and delete the null ones.