Cannot set default value of a Guid column

[Robert]

I just ran into a situation with the Beta where setting the default value of a Guid column throws an error. Here is some pseudocode:

    public class FloorPlanModel

    {

        [ScaffoldColumn(false)]

        public Guid Id { get; set; }

 

       [ScaffoldColumn(false)]

        public Guid PropertyId { get; set; }

 

        public string Name { get; set; }

 

        public decimal Bedrooms { get; set; }

}

And the following Grid code (unnecessary parts omitted):

@(Html.Kendo().Grid<FloorPlanModel>()

    .Name("floorPlanGrid")

    .Columns(columns =>

    {

        columns.Bound(p => p.Name);

        columns.Bound(p => p.Bedrooms).Width(80).EditorTemplateName("Bedrooms");

    })

    .DataSource(dataSource => dataSource

        .Ajax()

        .Batch(true)

        .ServerOperation(false)

        .Model(model => {

                            model.Id(p => p.Id);

                            model.Field(p => p.PropertyId).DefaultValue(Model.Id);

                            model.Field(p => p.Bedrooms).DefaultValue(1);

        })

    )

)

...where Model.Id is also a Guid, I get this error:

Cannot serialize objects of type System.Guid

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.NotSupportedException: Cannot serialize objects of type System.Guid

Source Error: 

Line 254: </div> Line 255: <div class="tab-pane" id="floorplans"> Line 256: @(Html.Kendo().Grid<AdvancedREI.Web.Models.FloorPlanModel>() Line 257: .Name("floorPlanGrid") Line 258: .Columns(columns =>

Source File: d:\TFSWorking\AdvancedREI\Development\Development\src\AdvancedREI.Web\Views\Properties\_Edit.cshtml    Line: 256 

Stack Trace: 

[NotSupportedException: Cannot serialize objects of type System.Guid] Kendo.Mvc.Infrastructure.JavaScriptInitializer.Serialize(IDictionary`2 object) +1180 Kendo.Mvc.Infrastructure.JavaScriptInitializer.Serialize(IDictionary`2 object) +354 Kendo.Mvc.Infrastructure.JavaScriptInitializer.Serialize(IDictionary`2 object) +354 Kendo.Mvc.Infrastructure.JavaScriptInitializer.Serialize(IDictionary`2 object) +354 Kendo.Mvc.Infrastructure.JavaScriptInitializer.Serialize(IDictionary`2 object) +354 Kendo.Mvc.Infrastructure.JavaScriptInitializer.Serialize(IDictionary`2 object) +354 Kendo.Mvc.Infrastructure.JavaScriptInitializer.Initialize(String id, String name, IDictionary`2 options) +260 Kendo.Mvc.UI.Grid`1.WriteInitializationScript(TextWriter writer) +1801 Kendo.Mvc.UI.ViewComponentBase.WriteHtml(HtmlTextWriter writer) +72 Kendo.Mvc.UI.Grid`1.WriteHtml(HtmlTextWriter writer) +1491 Kendo.Mvc.UI.ViewComponentBase.ToHtmlString() +106 Kendo.Mvc.UI.ViewComponentBuilderBase`2.ToHtmlString() +16 System.Web.WebPages.WebPageExecutingBase.WriteTo(TextWriter writer, Object content) +17 ASP._Page_Views_Properties__Edit_cshtml.Execute() in d:\TFSWorking\AdvancedREI\Development\Development\src\AdvancedREI.Web\Views\Properties\_Edit.cshtml:256 System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +280 System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +125 System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +196 Glimpse.Mvc3.Plumbing.GlimpseView.Render(ViewContext viewContext, TextWriter writer) +258 System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +380 Castle.Proxies.AsyncControllerActionInvokerProxy.InvokeActionResult_callback(ControllerContext controllerContext, ActionResult actionResult) +21 Castle.DynamicProxy.AbstractInvocation.Proceed() +72 Glimpse.Mvc3.Interceptor.InvokeActionResultInterceptor.Intercept(IInvocation invocation) +415 Castle.DynamicProxy.AbstractInvocation.Proceed() +316 System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +33 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +613 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +613 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +263 System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +240 System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +28 System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +53 System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15 System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__4(IAsyncResult asyncResult) +42 System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +607 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288

I can switch the Model to a string, set the default to Model.Id.ToString(), and then get it back into a Guid on the backend, but that is obviously not ideal.

Any chance this could get fixed before RTM?

Thanks!

[Rosen]

Hi Robert,

We are able observe the error you have described and the fix will be available with the next version of the KendoUI for ASP.NET MVC. Meanwhile I have updated your telerik points.

Regards,
Rosen
the Telerik team