ko.toJSON Issues

[mr.brad....@gmail.com]

I am attempting to use ko.toJSON to prep my data before I send it to the server and I am unable to get the data.

in HTML <pre data-bind="text: ko.toJSON($data, null, 2)"></pre>  works great! 

BUT in javascript ko.toJSON(viewModel) is returning undefined!  WHY?

Also if I use ko.toJS(viewModel) it works but I get all the function code.

Anyone have any ideas?

[Benjamin Gudehus]

Maybe your viewModel is a function?

> console.log(typeof(viewModel))

function

2012/9/5 <mr.brad....@gmail.com>

[mr.brad....@gmail.com]

Yes it is a function.   What are my options?  Do I have to recode it to a variable or is there a less painful way?

[rpn]

Maybe you can share some of your code.  Otherwise, if you are using a constructor function and your function that does ko.toJSON is on the view model, then you can call ko.toJSON(this) or ko.toJSON(self) if you saved off the value of this.

like:

var ViewModel = function() {

   this.name = ko.observable("Bob");

   this.save = function() {

       alert(ko.toJSON(this));

   };

};

[Benjamin Gudehus]

The two options to define a view model is to use object notation or a constructor function.

// object notation.

var viewModel = {name: ko.observable("Bob")}

ko.applyBindings(viewModel)

console.log(ko.toJSON(viewModel))

// contructor function.

var ViewModel = function() {

    this.name = ko.observable("Bob")

}

var viewModel = new ViewModel()

ko.applyBindings(viewModel)

console.log(ko.toJSON(viewModel))

By convention variable names of constructor functions should be like class names in e.g. Java and C#, so everyone can see, that one has to use the new keyword.

I think you just mixed the constructor function with the instantiated object.

--Benjamin

2012/9/5 <mr.brad....@gmail.com>

[mr.brad....@gmail.com]

Thanks, I had blended a couple of examples and lost track of what I was doing, I will watch my notation use moving forward.

What fixed it was proper use of the constructor so I had a viewModel variable. 

Working well now, much appreciated!