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POUsing a computed column with JSON
 

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    <p>I am trying to make a computed column on data returned via JSON. I cannot get it to work. I either get a <code>NAN</code> value or it says the column does not exist.</p> <p>javascript:</p> <pre><code>function commissionsViewModel() { var self = this; self.commissions = ko.observableArray(); ko.applyBindings(self, $("#commissions").get(0)); function LoadcommissionsFromServer() { $.post( '/commissions/data', function (data) { var results = ko.observableArray(); ko.mapping.fromJS(data, {}, results); for (var i = 0; i &lt; results().length; i++) { self.commissions.push(results()[i]); }; }, 'json' ) } LoadcommissionsFromServer(); self.ComissionAmount = ko.computed( function () { return this.CommissionableAmount * this.Rate * this.Modifier; }); return self; } var viewModel = commissionsViewModel(); </code></pre> <p>What I am trying to accomplish is for it to recalculate the CommissionAmount after I change the modifier or rate.</p> <p><strong>EDIT</strong></p> <p>If I manually map the fields I get the <code>NaN</code></p> <pre><code>function Commission(data) { this.Status = ko.observable(data.Status); this.OriginalCommissionCode = ko.observable(data.OriginalCommissionCode); this.NewCommissionCode = ko.observable(data.NewCommissionCode); this.InvoiceNumber = ko.observable(data.InvoiceNumber); this.CustomerID = ko.observable(data.CustomerID); this.CommissionableAmount = ko.observable(data.CommissionableAmount); this.Modifier = ko.observable(data.Modifier); this.Rate = ko.observable(data.Rate); this.SalesAmount = ko.observable(data.SalesAmount); this.NonSalesAmount = ko.observable(data.NonSalesAmount); this.CommissionAmount = ko.computed(function () { return this.CommissionableAmount * this.Rate * this.Modifier; }); } function commissionsViewModel() { var self = this; self.commissions = ko.observableArray(); $.post( '/commissions/data', function (allData) { var mappedTasks = $.map(allData, function (item) { return new Commission(item) }); self.commissions(mappedTasks); }, 'json' ); } ko.applyBindings(new commissionsViewModel()); </code></pre>
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    1. CO[Stack Overflow is not going to read all that](http://meta.stackexchange.com/a/129787/172496)
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    2. COI edited the post to remove the HTML. Really, i just need to figure out why the ko.computed is not working.
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