我将下面的数组绑定到模板

function Customer(id, name){
   this.Id = ko.obserable(id);
   this.Name = ko.obserable(name);
}

var customer1 = new Customer(1, "a");
var customer2 = new Customer(2, "b");

var customers = [customer1, customer2];

var oa = ko.observableArray(customers);

oa.subscribe(function(newValues){
   //How to force trigger this when a customer property gets updated?
});

当我在视图上更新客户名称时，阵列具有更新的数据，但它不通知其订阅者。如何解决此问题并强制通知其订阅者？