ko.mapping.fromJS with an array of JayData objects [closed]

Question

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.

Closed 8 years ago.

When I use an array of custom jaydata objects the result is bizarre.

var arr = [];
arr.push(new Northwind.Employee());
arr.push(new Northwind.Employee());

var newarr = ko.mapping.fromJS(arr);

If the debug is observed, the variable newarr looks like an observable array. If you try to unwrap to expose the underlying array:

newarr()

you get "An unspecified error has occured."

To make things weirder, if you go a step further:

newarr()[0]

you are blessed with the first element of the array. Knockout bindings behave as expected, I just cannot perform array operations (length, push, pop) and that is critical.

I really need the mapping.fromJS as I'm dealing with large trees of objects and I'm baffled regarding how to proceed from here. Mapping behaves properly with POJO objects, but jaydata is a crucial piece to my puzzle as well. Can anyone help show me what I'm doing wrong?

Here is a fiddle with what I'm discussing. I can't get it to work but it at least gives a full context. http://jsfiddle.net/jpirok/AAEuM/

Thanks for your help!

Answer 1

This ended up being a non-issue. Thanks for the help and sorry it took me awhile to close this!

Answer 2

I work for JayData. JayData support knockoutjs, we have lots of examples here: http://jaydata.org/examples/index.html

Have you included jaydatamodules/knockout.js?