javascript - 如何使用ko.mapping-Knockout更新Javascript对象中的属性？

假设我们有以下对象：

var gridViewModelJs =
    {"GridViewModel":{"Rows":[{"RowNumber":"1","Id":"6","Name":"FullNameOfUser","NumberOfUsers":"12","RegistrationDate":"10/15/2013"}],"FoundItems":"4","CurrentPage":1,"TotalPages":1,"ItemsPerPage":50,"PagingLinks":""},
    "EntityModel":{"Id":0,"PermissionIds":null,"Name":null,"NumberOfUsers":0,"PersianRegistrationDate":null,"RegistrationDate":"0001-01-01T00:00:00","Authorizations":null,"Users":null,"Contents":null}};
var KoEntityViewModel = ko.mapping.fromJS(gridViewModelJs);
ko.applyBindings(KoEntityViewModel);

上面的代码有效，用于更新KoEntityViewModel.，我使用了以下代码：

// receivedData is data that returns from jQuery Ajax
// I'm dead sure `receivedData` is correct
var doneFunc = function (receivedData) {
    ko.mapping.fromJS(receivedData, KoEntityViewModel.EntityModel);
    showDetailsBlock();
};

但是KoEntityViewModel.EntityModel中没有任何更新。
请指导我如何更新上述示例中的KoEntityViewModel.EntityModel

最佳答案

在应用绑定后更新映射时，请使用三个参数：

ko.mapping.fromJS(receivedData, {}, KoEntityViewModel);