KnockoutJS Accessing an array of objects in a separate class

Question

So i have 2 classes, users and health readings. i made a array of user objects with an array of readings inside it.i just want access to the date and weight in the reading array, i have been trying for a long time to figure this out! please help this simple problem is driving me nuts!

// Class to represent a row in the seat reservations grid
function Reading(theDate,theWeight)
{

    self.theDate=ko.observable(theDate);
    self.theWeight=ko.observable(theWeight);
}

function User(name,weight,date) {
    var self = this;
    self.name = name;
    self.date = date;
    self.weight = ko.observable(weight);
     self.theReadings = ko.observableArray([
        new Reading(12,13)
    ]);

}
    // Editable data
      self.users = ko.observableArray([
        new User("George",1,2012),
        new User("Bindu",2,2012)
    ]);
    /this alerts an object but i dont know how to access the weight/date variable
    alert(self.users()[0].theReadings()[0]);

    self.readings = ko.observableArray([
        new Reading(12,13)

Brandon Wittwer · Accepted Answer · 2012-03-23 20:45:16Z

1

Just missed a few things on this one.

Here ya go.

http://jsfiddle.net/EN7y4/3/

Namely. You had "self.theWeight" in function Reading instead of "this."...

Happy Coding!

answered Mar 23, 2012 at 20:45

Brandon Wittwer

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3 Comments

Matthew Flaschen Over a year ago

One more thing. The only reason self works in the later code (below Editable data) is that it refers to window.self. This is somewhat confusing.

Phil Ninan Over a year ago

wow thank you so much! i knew it was something small i was doing wrong.

Brandon Wittwer Over a year ago

self, as matthew was refering, is not an object you should play with. It would be smart to hold your global objects within a namespace (var myapplication, or something like that), or within the DOM (jquery.data() objects)

Matthew Flaschen · Accepted Answer · 2012-03-23 19:37:33Z

0

alert(self.users()[0].theReadings()[0].theWeight();

I would recommend removing the 'thes'. That's an uncommon style.

answered Mar 23, 2012 at 19:37

Matthew Flaschen

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1 Comment

Phil Ninan Over a year ago

i tried adding the .theWeight() but it doesnt work. it kind of just breaks everything.

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