dependentObservable.notifySubscribers = undefined

[DrSammyD]

dependentObservable.notifySubscribers = undefined

[clekkas]

Hi DrSammyD,

Can you provide a more complete example for me to work with, you can use either http://jsfiddle.net or http://plnkr.co to share your code.

One thing I did notice is that your computed is missing the second parameter, 'this'. Here is an explanation of what the second parameter is; from knockoutjs.com (http://knockoutjs.com/documentation/computedObservables.html)

"...This defines the value of this when evaluating the computed observable. Without passing it in, it would not have been possible to refer to this.firstName() or this.lastName()...."

So I would expect in your code something like this:

  self.rigSelect = ko.dependentObservable(function () {
            var rigs = _(self.rigs()).map(function (rig) {
                return {
                    rig: rig,
                    name: '('+(rig.number())+ ') ' + (rig.name())
                };
            });
            return rigs.value();

        }, this);

Hope this helps

[mbest]

@DrSammyD, what version of Deferred Updates? Can you provide a complete stack trace?

[DrSammyD]

Sorry guys, I'm having difficulty replicating this error. I went into the code and fixed it locally, then continued coding the rest of my view model, didn't check anything in because it was erring out.

I'm using version 3.0.0
I changed line 534 to

if ((!dependentObservable.equalityComparer || !dependentObservable.equalityComparer(_latestValue, newValue)) /*&& dependentObservable.notifySubscribers != undefined*/) 

which fixed the problem, but I'm not sure what else that might do to the code.
My model looked like this

var vm = function () {
    var self = this;
    self.rigs = ko.observableArray();
    self.rigs(service.getRigs());
    self.rigSelect = ko.dependentObservable(function () {
        var rigs = _(self.rigs()).map(function (rig) {
            return {
                rig: rig,
                name: '('+(rig.number())+ ') ' + (rig.name())
            };
        });
        return rigs.value();
   });

};

When I took out my fix to get the stack trace, the error didn't come back. I'll let you know if/when it does.