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List实体.所以我可以预测A内的元素.
再次：
class A
{
someprop;
List<B> childB;
}
Class B
{
somepropB;
}
到现在为止还挺好.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.
看起来结果是无法用集合更新实体？
解决方法
如果您希望这样的场景起作用,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,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所以我的下面的示例正在处理“交付”和“客户”对象.
服务器端域模型
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
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); }
}
}
客户端域模型
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可观察的数组中
/// <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);
风景
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>
结果
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,所以你必须没有它
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","IsDelivered":false
}
}]
[{
"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","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.
