How do I return data to a template with Knockout and Requirejs modules? - templates

Question

I'm having a difficult time returning data from a module using RequireJS and Knockout to populate my markup for my single page app. Knockout can't seem to find my data binding observables.
I'm trying to keep each view in a separate js file, but I'm failing to identify where I've gone wrong. Here's what I have so far:
/app/app.js
define(function(require) {
require('simrou');
var $ = require('jQuery'),
ko = require('knockout'),
videoView = require('videoView');
var init = function() {
var viewModel = function() {
var self = this;
self.currentPage = ko.observable();
self.videoView = new videoView();
}
var view = new viewModel();
ko.applyBindings( view );
_router = new Simrou({
'/video/:id': [ view.videoView.getVideo ]
});
_router.start();
};
return {
init: init
};
});
/app/videoView.js
define(function(require) {
"use strict";
var $ = require('jQuery'),
ko = require('knockout');
return function() {
var self = this;
self.currentPage = ko.observable( 'showVideo' );
self.currentVideo = ko.observable();
self.videoData = ko.observableArray([]);
self.videoList = ko.observableArray([]);
var getVideo = function( event, params ) {
// ajax pseudo code
$.ajax({});
self.videoData( dataFromAjaxCall );
}
return {
getVideo: getVideo
};
};
});
index.html
When I browse to /#/video/14 I receive the following error:
Uncaught ReferenceError: Unable to parse bindings.
Bindings value: attr: { 'data-video-id': videoData().id }
Message: videoData is not defined
Here's the markup:
<section id="showVideo" data-bind="fadeVisible: currentPage()=='showVideo', with: $root">
<div class="video" data-bind="attr: { 'data-video-id': videoData().id }></div>
</section>
Like I said, I'm trying to keep each view separated, but I would love some enlightenment on what I'm doing wrong, or if this is even possible? Is there a better more efficient way?

Answer 1

videoData is a property of $root.videoView, not of the root model (the one you passed to applyBindings). It's also an observableArray, so videoData() is just a plain array and even if you get the context right, you won't be able to access its id property, since, being an array, it doesn't have.named properties.