OrchardCore: Adding custom content part exception under edit

Version

Using Orchard Core Cms App, Module, etc, VS2019 project templates, 1.2.2.

Describe the bug

Exception adding custom part to out of the box boilerplate recipe item.

To Reproduce

I added the custom content part to the item type, tried to edit, then I got this.

Exception: Shape type 'AssemblyCredentialsPart_Edit' not found
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.ExecuteAsync(DisplayContext context)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.ExecuteAsync(DisplayContext context)
CallSite.Target(Closure , CallSite , object )
AspNetCore.Views_ContentPart_Edit.ExecuteAsync()
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, bool invokeViewStarts)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.RenderPartialCoreAsync(string partialViewName, object model, ViewDataDictionary viewData, TextWriter writer)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.PartialAsync(string partialViewName, object model, ViewDataDictionary viewData)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.<ProcessAsync>g__Awaited|11_0(Task<IHtmlContent> task)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.ExecuteAsync(DisplayContext context)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.ExecuteAsync(DisplayContext context)
OrchardCore.DisplayManagement.Zones.ZoneShapes.ContentZone(IDisplayHelper DisplayAsync, object Shape, IShapeFactory ShapeFactory)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.<ProcessAsync>g__Awaited|11_0(Task<IHtmlContent> task)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.ExecuteAsync(DisplayContext context)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.ExecuteAsync(DisplayContext context)
CallSite.Target(Closure , CallSite , object )
AspNetCore.Views_Content_Edit.ExecuteAsync()
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, bool invokeViewStarts)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.RenderPartialCoreAsync(string partialViewName, object model, ViewDataDictionary viewData, TextWriter writer)
Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.PartialAsync(string partialViewName, object model, ViewDataDictionary viewData)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.<ProcessAsync>g__Awaited|11_0(Task<IHtmlContent> task)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.ExecuteAsync(DisplayContext context)
OrchardCore.DisplayManagement.Implementation.DefaultHtmlDisplay.ExecuteAsync(DisplayContext context)
CallSite.Target(Closure , CallSite , object )
AspNetCore.Views_Admin_Edit+<>c__DisplayClass14_0+<<ExecuteAsync>b__1>d.MoveNext()
Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperExecutionContext.GetChildContentAsync(bool useCachedResult, HtmlEncoder encoder)
Microsoft.AspNetCore.Mvc.TagHelpers.RenderAtEndOfFormTagHelper.ProcessAsync(TagHelperContext context, TagHelperOutput output)
Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperRunner.<RunAsync>g__Awaited|0_0(Task task, TagHelperExecutionContext executionContext, int i, int count)
AspNetCore.Views_Admin_Edit.ExecuteAsync()
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, bool invokeViewStarts)
Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, string contentType, Nullable<int> statusCode)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, string contentType, Nullable<int> statusCode)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ActionContext actionContext, IView view, ViewDataDictionary viewData, ITempDataDictionary tempData, string contentType, Nullable<int> statusCode)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.ExecuteAsync(ActionContext context, ViewResult result)
Microsoft.AspNetCore.Mvc.ViewResult.ExecuteResultAsync(ActionContext context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeResultAsync>g__Logged|21_0(ResourceInvoker invoker, IActionResult result)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|29_0<TFilter, TFilterAsync>(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext<TFilter, TFilterAsync>(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeResultFilters>g__Awaited|27_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
SixLabors.ImageSharp.Web.Middleware.ImageSharpMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
OrchardCore.Liquid.ScriptsMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Localization.RequestLocalizationMiddleware.Invoke(HttpContext context)
OrchardCore.Diagnostics.DiagnosticsStartupFilter+<>c__DisplayClass3_0+<<Configure>b__1>d.MoveNext()
Microsoft.AspNetCore.Diagnostics.StatusCodePagesMiddleware.Invoke(HttpContext context)
OrchardCore.ContentPreview.PreviewStartupFilter+<>c+<<Configure>b__1_1>d.MoveNext()
OrchardCore.Modules.ModularTenantRouterMiddleware.Invoke(HttpContext httpContext)
OrchardCore.Logging.SerilogTenantNameLoggingMiddleware.Invoke(HttpContext context)
OrchardCore.Modules.ModularTenantContainerMiddleware+<>c__DisplayClass4_0+<<Invoke>b__0>d.MoveNext()
OrchardCore.Environment.Shell.Scope.ShellScope.UsingAsync(Func<ShellScope, Task> execute, bool activateShell)
OrchardCore.Environment.Shell.Scope.ShellScope.UsingAsync(Func<ShellScope, Task> execute, bool activateShell)
OrchardCore.Environment.Shell.Scope.ShellScope.UsingAsync(Func<ShellScope, Task> execute, bool activateShell)
OrchardCore.Environment.Shell.Scope.ShellScope.UsingAsync(Func<ShellScope, Task> execute, bool activateShell)
OrchardCore.Modules.ModularTenantContainerMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Expected behavior

First should probably have an Edit view out of the box, or that there was one, the naming convention is misaligned, perhaps. The default I think was, AssemblyCredentialsPart.Edit.cshtml, but I’m not certain.

Follow on concerns

And perhaps corrolary to this, what is it that we should edit per se, for a custom part? And how does that relay through the model, view model, etc, what sort of bindings are there, what is serialized and persistent if at all, and so forth.