Issues with UWP on EF7 beta 6

[m0ngr31]

I have a UWP app ready to go, but it crashes when running in .NET native. It took me a while to pin down why (Debug runs fine), but I think this is the problem: MakeGenericMethod() cannot create this generic method instantiation because the instantiation was not metadata-enabled: 'MicrosoftDataEntityMetadataInternalClrAccessorSource<MicrosoftDataEntityMetadataInternalIClrPropertySetter>CreateGeneric<app_Unofficial.Models.appModels,MicrosoftDataEntityDbSet<app_Unofficial.Models.Favorite>. I don't even know what this means, but this is one of my Entity models. Any suggestions? The code for this is after one of my other Models. It didn't seem to have any issues?

[natemcmaster]

Yes, this is exactly the issue we are working on in #623. It's ugly, but if you really need to work around this, you will need to add runtime directives to your project.

In Default.rd.xml, you will need to add lines that look like this (this is the bit I had to add for my testproject...names will be different for you). This is just one instance. You will probably need more, especially for queries and for anything that uses re-linq. (They also use MakeGenericMethod).

 <Type Name="Microsoft.Data.Entity.Metadata.Internal.ClrAccessorSource{Microsoft.Data.Entity.Metadata.Internal.IClrPropertySetter}">
      <MethodInstantiation Name="CreateGeneric" Arguments="NetNative.BloggingContext,Microsoft.Data.Entity.DbSet{NetNative.Blog},Microsoft.Data.Entity.DbSet{NetNative.Blog}" Dynamic="Required" />
      <MethodInstantiation Name="CreateGeneric" Arguments="NetNative.BloggingContext,Microsoft.Data.Entity.DbSet{NetNative.Post},Microsoft.Data.Entity.DbSet{NetNative.Post}" Dynamic="Required" />
  </Type>

This is an unfortunate result of https://msdn.microsoft.com/en-us/library/dn600644(v=vs.110).aspx.

A MethodInstantiation directive is required for each different instantiation of the method that is dynamically invoked, and the Arguments element is updated to reflect each different instantiation argument.

We cannot provide these directives in EF directly, but will examine better solutions than adding loads of XML to your project....stay tuned.

[m0ngr31]

I can't seem to get it working... I got rid of that original error, but now I'm seeing this:

TypeHandles are not supported for types that return true for ContainsGenericParameters

[natemcmaster]

@m0ngr31 I haven't seen this error yet. .NET Native support is still a work in progress, and it is currently a minefield of bugs. If you can share any more details about this error message your project and types, which call triggered this, etc. we would appreciate it.

[m0ngr31]

@natemcmaster What info would help the most? I had to dig around in the memory to find that little error snip.

I can add you to my Bitbucket repo if that would be easiest?

[natemcmaster]

@m0ngr31 Please link to your repo here so I and the community can see what is causing the issue. If it's not a public project, please create a separate, public repo that reproduces the issue without your "secret sauce".

[m0ngr31]

I don't have anything to hide, I'm just a terrible programmer! Here's my repo: https://github.com/m0ngr31/Wikki

Hopefully you can figure out something...

[natemcmaster]

@m0ngr31 Thanks for sharing. The issue you encountered above ("TypeHandles ...") is a bug in UWP. I've passed along info to the net native team and they will work on fixing it. We hope to deliver a solution that doesn't require you to include lines of XML. Closing this issue as it is part of #623.

[m0ngr31]

Is there a way I can track the progress of this bug with the .net native team?

[natemcmaster]

Nope. 😞 I will update #623 as we make progress on this and other issues in our dependencies.