knockout js polling not working - json

Question

I am having difficulty with knockout refreshing.
Here's my viewModel;
$(document).ready(function () {
ko.applyBindings(new Task(), document.getElementById('taskSummary'));
setInterval(Task, 2000);
});
function task(name, description, project) {
var self = this;
self.name= ko.observable(name);
self.description = ko.observable(description);
self.project = ko.observable(project);
}
function Task() {
var self = this;
self.tasks = ko.observableArray([]);
self.tasks.removeAll;
$.getJSON("/api/tasks/5", function (data) {
$.each(data, function (key, val) {
self.tasks.push(new task(val.Name, val.Description, val.Project));
});
});
}
It returns data to the view but does not update when I change the data in the back end database.
any help appreciated. Im sure its something small that I'm missing.

Answer 1

For knockout, it might be better if you apply your model to a new Task instance, save that instance, then set up a setInterval loop that can modify the Task's "tasks" observableArray values.
$(document).ready(function () {
var oTask = new Task();
ko.applyBindings(oTask, document.getElementById('taskSummary'));
function onLoop() {
var self = oTask;
$.getJSON("/api/tasks/5", function (data) {
self.tasks.removeAll(); // not sure if you need this...
$.each(data, function (key, val) {
self.tasks.push(new task(val.Name, val.Description, val.Project));
});
});
}
setInterval(onLoop, 2000);
});