Attempting to transform the items within my JSON array into my KO observable function

I am currently working with a JSON array that I have read in. My goal is to convert each object within the array into a Knockout (KO) observable so that it can be properly mapped to the function.

function Person(data)
{
    this.name = ko.observable(data.name);
    this.age = ko.observable(data.age);
    this.link = ko.observable(data.link);  
}

function ViewModel()
{
    var self = this;    
    self.Persons = ko.observableArray([]);

    var JSONdataFromServer;
    $.getJSON('http://127.0.0.1:8080', function(data) {
        self.Persons(data);
        for(var k in self.Persons) {
            k = $.map(k, function(item) { return new Person(item) });
        }
    });
}

However, when running this code snippet (only a portion of it), an error occurs stating "Cannot use 'in' operator to search for '0' in G". My main objective remains converting the JSON objects within the Persons array into KO observable objects of type Person.

Answer №1

myGroup.Members represents an observableArray, so to view its contents, you must call it:

for (var m in myGroup.Members())

I find some of your actions rather puzzling. To transform the JSON object into an observableArray of Members, you would typically do something like this (depending on the data structure -- which you haven't specified):

$.getJSON('http://127.0.0.1:8080', function(data) {
    var arrayOfMembers = ko.utils.arrayMap(data, function (item) {
        return new Member(item);
    });
    myGroup.Members(arrayOfMembers);
});

Answer №2

Instead of tediously mapping incoming data from the server by hand, consider using the knockout mapping plugin. Keeping your client-side viewModel in line with server data can become cumbersome as the viewModel grows larger. It's wise to utilize knockout mapping for greater flexibility and control over how the mapping process operates.

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