Visual Studio 2022 17.3.0 breaks JsonAPIDotNet 5.0.1

[telosity]

We are JsonApiDotNetCore library (5.0.1). in developing a rich REST API. All is working well.

However, today I updated my VS 2022 to 17.3.0, and now when I try to run I get the error JsonApiDotNetCore.Errors.InvalidConfigurationException with the message "Multiple controllers found for resource type ...

Running the same source on a non-updated VS2022 works just fine.

Not a code change between running on different machines, other than the VS2022 version,
and the compiled application runs perfectly.

[telosity]

at JsonApiDotNetCore.Middleware.JsonApiRoutingConvention.Apply(ApplicationModel application)
at Microsoft.AspNetCore.Mvc.ApplicationModels.ApplicationModelConventions.ApplyConventions(ApplicationModel applicationModel, IEnumerable1 conventions) at Microsoft.AspNetCore.Mvc.ApplicationModels.ApplicationModelFactory.CreateApplicationModel(IEnumerable1 controllerTypes)
at Microsoft.AspNetCore.Mvc.ApplicationModels.ControllerActionDescriptorProvider.GetDescriptors()
at Microsoft.AspNetCore.Mvc.ApplicationModels.ControllerActionDescriptorProvider.OnProvidersExecuting(ActionDescriptorProviderContext context)
at Microsoft.AspNetCore.Mvc.Infrastructure.DefaultActionDescriptorCollectionProvider.UpdateCollection()
at Microsoft.AspNetCore.Mvc.Infrastructure.DefaultActionDescriptorCollectionProvider.Initialize()
at Microsoft.AspNetCore.Mvc.Routing.ActionEndpointDataSourceBase.<>c__DisplayClass11_0.b__0()
at Microsoft.Extensions.Primitives.ChangeToken.OnChange(Func`1 changeTokenProducer, Action changeTokenConsumer)
at Microsoft.AspNetCore.Mvc.Routing.ActionEndpointDataSourceBase.Subscribe()
at Microsoft.AspNetCore.Mvc.Routing.ControllerActionEndpointDataSource..ctor(ControllerActionEndpointDataSourceIdProvider dataSourceIdProvider, IActionDescriptorCollectionProvider actions, ActionEndpointFactory endpointFactory, OrderedEndpointsSequenceProvider orderSequence)
at Microsoft.AspNetCore.Builder.ControllerEndpointRouteBuilderExtensions.GetOrCreateDataSource(IEndpointRouteBuilder endpoints)
at Microsoft.AspNetCore.Builder.ControllerEndpointRouteBuilderExtensions.MapControllers(IEndpointRouteBuilder endpoints)
at Program.

$(String[] args) in C:\Users\gerry.hull\source\repos\dragonfly-api\Dragonfly.Api\Program.cs:line 50

[bkoelman]

I'm having trouble reproducing this using v17.3, but it seems related to source generators. Do you see duplicate classes in Visual Studio?

Something else you can try: add the following to your .csproj, rebuild and inspect the contents of .\obj\Debug\net6.0\generated\JsonApiDotNetCore.SourceGenerators\JsonApiDotNetCore.SourceGenerators.ControllerSourceGenerator\

<PropertyGroup>
	<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
</PropertyGroup>

Also the usual cleanup steps may help, such as removing all bin/obj folders, git clean -xdf, deleting the .vs folder etc.

If all else fails, can you try creating a minimal repro project?

[bkoelman]

In case it helps to unblock you and you don't want to downgrade VS: Try removing [Resource] from your resource classes and manually add controller classes as described at Earlier versions in https://www.jsonapi.net/usage/extensibility/controllers.html#earlier-versions.

[bkoelman]

Many other projects are suffering from the same problem, which apparently is caused by a bug in recent versions of the .NET 6 SDK. There's a long thread at dotnet/wpf#6792, listing several workarounds.

[bkoelman]

Official statement from Microsoft at: https://github.com/dotnet/core/blob/main/release-notes/6.0/known-issues.md#issues-building-wpf-application-with-windows-desktop-607-and-608.

[telosity]

Thanks much for the quick and detailed reply. I may have to downgrade we shall see.

[telosity]

Our issue is resolved. We had partial classes for each controller as we needed to attribute them for security reasons. In addition, we had the [Resource] attribute. Removing that solved the problem. Thank you!