knockout mapping + add to observable array

Question

Fiddle can be found here.

I'm adding to an observable array which is mapped by ko.mapping.fromJS().

In my view I'm building a URL by using a property on the array attr: { href: '/Users/Summary?userId=' + ID() }.

If I want to add an item to the array I'm using self.Users.push().

If I do that I get an error of ID is not a function.

So my question is whats the correct way of adding an item to the array, or am I not building the href attr properly?

Markus Jarderot · Accepted Answer · 2012-12-05 06:37:54Z

6

It seems like you are trying to push a plain object (without observables). You need first construct it, or map it to obsevables.

self.Users.push(new User(data));

or

self.Users.push(ko.mapping.fromJS(data, mapping));

Another alternative would be to just remove the () from the expression. But then the observable ID-properties will behave strangly.

edited Dec 5, 2012 at 6:37

answered Dec 4, 2012 at 22:54

Markus Jarderot

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1 Comment

Colin Over a year ago

Puurfect! I didn't want to remove the () nor did I want to define User for the line self.Users.push(new User(data)). So I changed it to your section option and it worked fine. Thanks!

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