RDG does not support route handlers that return an anonymous type

[captainsafia]

Given the code:

app.MapGet("/", () => new { Name = "Tester"});

The RDG will generate code that fails to comply because of the anonymous type is unspeakable.

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 8 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
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[captainsafia]

I'm taking a look at getting this working by taking advantage of the interceptors prototype that is in https://github.com/dotnet/aspnetcore/tree/safia/interceptors-prototype.

The first onion to peel is that at the moment, we don't have access to a speakable type name for the anonymous types in two locations.

• The strongly-typed endpoint definition
• The cast from Delegate to the strongly typed handler that can be invoked with parameters

Interceptors solve the first problem but we still have the second issue to contend with.

[captainsafia]

Update: we realized that even if we get this working from RDG's perspective, the JSON generator still lacks support for anonymous types so we're likely to deadend here.

Moving this issue to Low/never since we can't take any action immediately. We already emit a diagnostic so we are good there.

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.