Refreshing information in two view models using Ajax

I am currently working on an application that utilizes two viewmodels. One is responsible for rendering a form, while the other displays a table of form data.

My issue lies in reloading the form after it has been successfully saved via an Ajax call. Even though the table reloads as expected, I haven't been able to achieve the same result with the form. Can you review the code below and provide guidance on how to approach this problem?

function FormViewModel() {
    self = this;
    self.loadForm = function () {
    ...
    }

    self.save = function () {
    success: self.loadForm();
             tvm.loadTable();
    }
}

function TableViewModel() {
    self = this;
    self.loadTable = function () {
    ...
    };
}
ko.applyBindings(fvm = new FormViewModel(), document.getElementById("Form"));
fvm.loadForm();

ko.applyBindings(tvm = new TableViewModel(), document.getElementById("Table"));
tvm.loadTable();

Answer №1

After reviewing the initial 7 version that you shared, it appears that there are some issues with its functionality. However, I have identified what could be causing these problems:

http://jsfiddle.net/FZ6K6/12/

There are two main issues that stand out to me:

self = this;

The use of self = this; in two different places is creating a global variable self, causing confusion within the FormViewModel methods as self ends up referencing TableViewModel instead. To fix this, simply declare var self = this;

Additionally, when initializing a new observable using <code>ko.observableArray, it's important to avoid rebinding. It's recommended to create the observable once and update its value as necessary instead of triggering a rebind. Follow approach B rather than A.

//A
self.load = function () { self.a = ko.observable(); };

//B
self.a = ko.observable();
self.load = function () { self.a(null); };

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