我得到一个简单的DTO实体A加载到我的upshot viewmodel中，可以通过Knockoutjs快乐地查看。
我的DTO A包含一个列表实体。所以我可以预测A中的元素。
再次：
class A
{
someprop;
List<B> childB;
}
Class B
{
somepropB;
}
到目前为止一切顺利。我可以毫无问题地迭代数据。 但是如果我在A和SaveAll的实例中更改“someprop”，服务器根本不会响应。 甚至不调用updateData控件方法。 如果我在将childB.Clear（）发送到客户端之前清除它，一切都很好。
似乎结果是无法用集合更新实体？
答案 0 :(得分：3)
如果您希望这样的场景有效，还有一些工作要做。 Upshot仅转换可观察项目中的父实体。所以只有类A的javascript表示是一个淘汰可观察的，B类的javascript表示不是。因此，Upshot不知道关联对象的任何更改。
解决方案是手动映射实体。为了让我的生活更轻松，我在下面的代码片段中使用了我的“DeliveryTracker”示例应用程序中的代码。在我的博客文章中，您可以看到手动映射的示例：http://bartjolling.blogspot.com/2012/04/building-single-page-apps-with-aspnet.html所以下面的示例正在处理“交付”和“客户”对象。
namespace StackOverflow.q9888839.UploadRelatedEntities.Models
{
public class Customer
{
[Key]
public int CustomerId { get; set; }
public string Name { get; set; }
public string Address { get; set; }
public double Latitude { get; set; }
public double Longitude { get; set; }
public virtual ICollection<Delivery> Deliveries { get; set; }
}
public class Delivery
{
[Key]
public int DeliveryId { get; set; }
public string Description { get; set; }
public bool IsDelivered { get; set; }
[IgnoreDataMember] //needed to break cyclic reference
public virtual Customer Customer { get; set; }
public virtual int CustomerId { get; set; }
}
public class AppDbContext : DbContext
{
public DbSet<Customer> Customers { get; set; }
public DbSet<Delivery> Deliveries { get; set; }
}
}
数据服务控制器公开符合OData标准的数据 的 “http：//本地主机：[yourport] / API / DataService的/ GetCustomers的”。为了能够更新客户和交付，您需要定义UpdateCustomer和UpdateDelivery函数
namespace StackOverflow.q9888839.UploadRelatedEntities.Controllers
{
public class DataServiceController : DbDataController<AppDbContext>
{
//Service interface for Customer
public IQueryable<Customer> GetCustomers()
{
return DbContext.Customers.Include("Deliveries").OrderBy(x => x.CustomerId);
}
public void InsertCustomer(Customer customer) { InsertEntity(customer); }
public void UpdateCustomer(Customer customer) { UpdateEntity(customer); }
public void DeleteCustomer(Customer customer) { DeleteEntity(customer); }
//Service interface for Deliveries
public void InsertDelivery(Delivery delivery) { InsertEntity(delivery); }
public void UpdateDelivery(Delivery delivery) { UpdateEntity(delivery); }
public void DeleteDelivery(Delivery delivery) { DeleteEntity(delivery); }
}
}
添加包含客户端模型的新javascript文件。在这里，我明确地将每个房产变成了一个可以观察到的淘汰赛。解决问题的关键是Customer对象的构造函数中的行，我将传入的交付映射到一个可观察的数组
/// <reference path="_references.js" />
(function (window, undefined) {
var deliveryTracker = window["deliveryTracker"] = {}; //clear namespace
deliveryTracker.DeliveriesViewModel = function () {
// Private
var self = this;
self.dataSource = upshot.dataSources.Customers;
self.dataSource.refresh();
self.customers = self.dataSource.getEntities();
};
deliveryTracker.Customer = function (data) {
var self = this;
self.CustomerId = ko.observable(data.CustomerId);
self.Name = ko.observable(data.Name);
self.Address = ko.observable(data.Address);
self.Latitude = ko.observable(data.Latitude);
self.Longitude = ko.observable(data.Longitude);
self.Deliveries = ko.observableArray(ko.utils.arrayMap(data.Deliveries, function (item) {
return new deliveryTracker.Delivery(item);
}));
upshot.addEntityProperties(self, "Customer:#StackOverflow.q9888839.UploadRelatedEntities.Models");
};
deliveryTracker.Delivery = function (data) {
var self = this;
self.DeliveryId = ko.observable(data.DeliveryId);
self.CustomerId = ko.observable(data.CustomerId);
self.Customer = ko.observable(data.Customer ? new deliveryTracker.Customer(data.Customer) : null);
self.Description = ko.observable(data.Description);
self.IsDelivered = ko.observable(data.IsDelivered);
upshot.addEntityProperties(self, "Delivery:#StackOverflow.q9888839.UploadRelatedEntities.Models");
};
//Expose deliveryTracker to global
window["deliveryTracker"] = deliveryTracker;
})(window);
在index.cshtml中初始化Upshot，指定自定义客户端映射并绑定viewmodel
@(Html.UpshotContext(bufferChanges: false)
.DataSource<StackOverflow.q9888839.UploadRelatedEntities.Controllers.DataServiceController>(x => x.GetCustomers())
.ClientMapping<StackOverflow.q9888839.UploadRelatedEntities.Models.Customer>("deliveryTracker.Customer")
.ClientMapping<StackOverflow.q9888839.UploadRelatedEntities.Models.Delivery>("deliveryTracker.Delivery")
)
<script type="text/javascript">
$(function () {
var model = new deliveryTracker.DeliveriesViewModel();
ko.applyBindings(model);
});
</script>
<section>
<h3>Customers</h3>
<ol data-bind="foreach: customers">
<input data-bind="value: Name" />
<ol data-bind="foreach: Deliveries">
<li>
<input type="checkbox" data-bind="checked: IsDelivered" >
<span data-bind="text: Description" />
</input>
</li>
</ol>
</ol>
</section>
导航到索引页面时，将异步加载客户列表和相关交付。所有交货按客户分组，并使用与交货的“IsDelivered”属性绑定的复选框进行预先修复。客户的名称也是可编辑的，因为它绑定到INPUT元素
我没有足够的声誉来发布截图，所以你不得不做一个
现在选中或取消选中IsDelivered复选框时，Upshot将检测更改并将其发布到DataService Controller
[{"Id":"0",
"Operation":2,
"Entity":{
"__type":"Delivery:#StackOverflow.q9888839.UploadRelatedEntities.Models",
"CustomerId":1,
"DeliveryId":1,
"Description":"NanoCircuit Analyzer",
"IsDelivered":true
},
"OriginalEntity":{
"__type":"Delivery:#StackOverflow.q9888839.UploadRelatedEntities.Models",
"CustomerId":1,
"DeliveryId":1,
"Description":"NanoCircuit Analyzer",
"IsDelivered":false
}
}]
修改客户名称时，Upshot将在输入框失去焦点时提交更改
[{
"Id": "0",
"Operation": 2,
"Entity": {
"__type": "Customer:#StackOverflow.q9888839.UploadRelatedEntities.Models",
"Address": "Address 2",
"CustomerId": 2,
"Latitude": 51.229248,
"Longitude": 4.404831,
"Name": "Richie Rich"
},
"OriginalEntity": {
"__type": "Customer:#StackOverflow.q9888839.UploadRelatedEntities.Models",
"Address": "Address 2",
"CustomerId": 2,
"Latitude": 51.229248,
"Longitude": 4.404831,
"Name": "Rich Feynmann"
}
}]
因此，如果您按照上述步骤操作，Upshot将为您更新父实体和子实体。