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POKnockout JS - viewModel access
 

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    <p>I'm writing an application for making a reservation. The reservation procedure is rather complex and has quite some dependencies so I decided to use knockout to help me observe changes and update the UI.</p> <p>I started implementing the customer list. The first customer in the form will be the one who has to enter his details, the others only need names. I figured I could just add a dependentObservable that checks if the current customer is the first one in the customers array to decide whether to display the additional fields.</p> <p>The problem is that when trying to access viewModel from a customer, I get only get 'undefined'. I tried passing a reference to viewModel to the customer, but that didn't work either. What am I doing wrong? Can viewModel not be accessed?</p> <p>Here's the code:</p> <pre><code>var customer = function(){ this.firstName = ko.observable(''); this.lastName = ko.observable(''); this.fullName = ko.dependentObservable( function(){ return this.firstName() + " " + this.lastName(); }, this ); this.gender = ko.observable(''); this.diet = ko.observable(''); this.primaryCustomer = ko.dependentObservable( function(){ console.log(viewModel); return viewModel.customers.indexOf(this) == 0; }, this ); this.email = ko.observable(''); } var viewModel = { customers: ko.observableArray([new customer()]), addCustomer: function(){ this.customers.push(new customer()); }, removeCustomer: function(customer){ this.customers.remove(customer); } } ko.applyBindings(viewModel); </code></pre>
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